Finite Group Databasebeta

← C13×#18029 #15704368

Subgroups — C13×#18029 #15704368

Order 3328.

600 conjugacy classes of subgroups.

The subgroup lattice has 580 nodes — too large to display as a diagram.

Conjugacy classes of subgroups

#subgroupG/Hclass sizemultiplicitynormal?properties
1C13×#3102C211yesmaximal, characteristic
2C13×#2994C211yesmaximal, characteristic, complemented
3C13×#2990C211yesmaximal, characteristic, complemented
4C13×#1593C211yesmaximal, characteristic, complemented
5C13×#1590C211yesmaximal, characteristic, complemented
6C13×#1587C211yesmaximal, characteristic, complemented
7C13×#1586C211yesmaximal, characteristic, complemented
8C13×#1582C211yesmaximal, characteristic, complemented
9C13×#1582C211yesmaximal, characteristic, complemented
10C13×#1580C211yesmaximal, characteristic, complemented
11C8×C13×SD16C211yesmaximal, characteristic, complemented
12C13×#1570C211yesmaximal, characteristic, complemented
13C13×#1495C211yesmaximal, characteristic, complemented
14C13×#1477C211yesmaximal, characteristic, complemented
15C13×#1454C211yesmaximal, characteristic, complemented
16C13×#529C2211yescharacteristic
17C4×C13×#41C2211yescharacteristic
18C13×#485C411yescharacteristic
19C13×#482C411yescharacteristic
20C13×#479C411yescharacteristic
21C13×#478C411yescharacteristic
22C13×#464C411yescharacteristic
23C13×#463C411yescharacteristic
24C13×#452C411yescharacteristic
25C13×#449C411yescharacteristic
26C13×#446C2211yescharacteristic
27C13×#446C2211yescharacteristic
28C13×#446C2211yescharacteristic
29C8×Q8×C13C2211yescharacteristic
30C4×C13×Q16C2211yescharacteristic
31C4×C13×SD16C2211yescharacteristic
32C4×C13×SD16C2211yescharacteristic
33C4×C13×D8C2211yescharacteristic
34C13×#436C2211yescharacteristic
35C13×#435—21no—
36C13×#435—21no—
37C13×#435—21no—
38C8×D4×C13—21no—
39C8×D4×C13C2211yescharacteristic
40C8×D4×C13C2211yescharacteristic
41C8×D4×C13C2211yescharacteristic
42C13×#433—21no—
43C13×#432—21no—
44C13×#431C2211yescharacteristic
45C13×#431C2211yescharacteristic
46C13×#431C2211yescharacteristic
47C13×#424—21no—
48C13×#423C2211yescharacteristic
49C2×C13×C4⋊C8—21no—
50C2×C13×C4⋊C8C2211yescharacteristic
51C13×#334C2211yescharacteristic
52C13×#334C2211yescharacteristic
53C13×#334C2211yescharacteristic
54C13×#334C2211yescharacteristic
55C13×Q8⋊C8C2211yescharacteristic
56C13×Q8⋊C8C2211yescharacteristic
57C13×Q8⋊C8C2211yescharacteristic
58C13×Q8⋊C8C2211yescharacteristic
59C13×D4⋊C8C2211yescharacteristic
60C13×D4⋊C8C2211yescharacteristic
61C13×D4⋊C8C2211yescharacteristic
62C13×D4⋊C8C2211yescharacteristic
63C13×#322C2211yescharacteristic
64C13×#322C2211yescharacteristic
65C13×#322C2211yescharacteristic
66C82×C13C2211yescharacteristic
67C2×C13×#41C2×C411yescharacteristic
68C2×C13×Q16C2×C411yescharacteristic
69C2×C13×SD16C2×C411yescharacteristic
70C2×C13×SD16C2×C411yescharacteristic
71C2×C13×D8C2×C411yescharacteristic
72C2×C13×M16—21no—
73C2×C13×M16—21no—
74C22×C8×C13—21no—
75C22×C8×C13—21no—
76C22×C8×C13—21no—
77C22×C8×C13—21no—
78C13×#126—21no—
79C13×#125C2×C411yescharacteristic
80C13×#124C2×C411yescharacteristic
81C13×#123—21no—
82C13×C22⋊Q8C2×C411yescharacteristic
83C13×#121C2×C411yescharacteristic
84C4×Q8×C13C2×C411yescharacteristic
85C4×Q8×C13C2311yescharacteristic
86C4×Q8×C13C2311yescharacteristic
87C4×D4×C13—21no—
88C4×D4×C13—21no—
89C4×D4×C13—21no—
90C4×D4×C13C2×C411yescharacteristic
91C4×D4×C13C2311yescharacteristic
92C4×D4×C13C2311yescharacteristic
93C13×#117—21no—
94C13×#117—21no—
95C13×#117C2×C411yescharacteristic
96C2×C42×C13—21no—
97C2×C42×C13C2311yescharacteristic
98C13×#107C2×C411yescharacteristic
99C13×#107C2×C411yescharacteristic
100C13×#106C2×C411yescharacteristic
101C13×#106C2×C411yescharacteristic
102C13×C4⋊C8—21no—
103C13×C4⋊C8—21no—
104C13×C4⋊C8—21no—
105C13×C4⋊C8—21no—
106C13×C4⋊C8—21no—
107C13×C4⋊C8—21no—
108C13×C4⋊C8—21no—
109C13×C4⋊C8C2×C411yescharacteristic
110C13×C4⋊C8C2×C411yescharacteristic
111C13×C4⋊C8D411yescharacteristic
112C13×C4⋊C8D411yescharacteristic
113C13×C4⋊C8C2311yescharacteristic
114C13×C4⋊C8C2311yescharacteristic
115C13×C4⋊C8C2311yescharacteristic
116C13×C4⋊C8C2311yescharacteristic
117C13×#103C2×C411yescharacteristic
118C13×#103C2×C411yescharacteristic
119C13×#103C2×C411yescharacteristic
120C13×#103C2×C411yescharacteristic
121C13×#102C2×C411yescharacteristic
122C13×#102C2×C411yescharacteristic
123C13×#102C2×C411yescharacteristic
124C13×#102C2×C411yescharacteristic
125C13×C22⋊C8—21no—
126C13×C22⋊C8—21no—
127C13×C22⋊C8—21no—
128C13×C22⋊C8—21no—
129C13×C22⋊C8—21no—
130C13×C22⋊C8C2×C411yescharacteristic
131C13×C22⋊C8C2×C411yescharacteristic
132C13×C22⋊C8D411yescharacteristic
133C13×C22⋊C8D411yescharacteristic
134C13×#97—21no—
135C13×#97—21no—
136C13×#97—21no—
137C4×C8×C13—21no—
138C4×C8×C13C2311yescharacteristic
139C4×C8×C13C2311yescharacteristic
140C4×C8×C13C2311yescharacteristic
141C4×C8×C13C2311yescharacteristic
142C4×C8×C13C2311yescharacteristic
143C4×C8×C13C2311yescharacteristic
144#18029C1311yesmaximal, characteristic, direct product factor, Sylow
145C13×#41—22no—
146C13×#41—41no—
147C2×Q8×C13C22×C411yescharacteristic
148C2×Q8×C13C22×C411yescharacteristic
149C2×D4×C13—21no—
150C2×D4×C13—21no—
151C2×D4×C13C22×C411yescharacteristic
152C2×D4×C13C22×C411yescharacteristic
153C22×C4×C13—21no—
154C22×C4×C13—21no—
155C22×C4×C13—21no—
156C22×C4×C13—21no—
157C22×C4×C13C22×C411yescharacteristic
158C22×C4×C13C2×D411yescharacteristic
159C22×C4×C13#4111yescharacteristic
160C13×Q16—41no—
161C13×SD16—22no—
162C13×SD16—41no—
163C13×D8—22no—
164C13×M16—81no—
165C13×M16—81no—
166C2×C8×C13—21no—
167C2×C8×C13—21no—
168C2×C8×C13—21no—
169C2×C8×C13—21no—
170C2×C8×C13—21no—
171C2×C8×C13—21no—
172C2×C8×C13—81no—
173C2×C8×C13—81no—
174C2×C8×C13—81no—
175C2×C8×C13—81no—
176C2×C8×C13C22×C411yescharacteristic
177C2×C8×C13C22×C411yescharacteristic
178C2×C8×C13C22×C411yescharacteristic
179C2×C8×C13C22×C411yescharacteristic
180C2×C8×C13C2×D411yescharacteristic
181C2×C8×C13C2×D411yescharacteristic
182C2×C8×C13C2×D411yescharacteristic
183C2×C8×C13C2×D411yescharacteristic
184C13×C4⋊C4—21no—
185C13×C4⋊C4—21no—
186C13×C4⋊C4—21no—
187C13×C4⋊C4—21no—
188C13×C4⋊C4—21no—
189C13×C4⋊C4—21no—
190C13×C4⋊C4C22×C411yescharacteristic
191C13×C4⋊C4C22×C411yescharacteristic
192C13×C4⋊C4C22×C411yescharacteristic
193C13×C4⋊C4C22×C411yescharacteristic
194C13×C22⋊C4—21no—
195C13×C22⋊C4—21no—
196C13×C22⋊C4—21no—
197C13×C22⋊C4—21no—
198C13×C22⋊C4—21no—
199C13×C22⋊C4—21no—
200C13×C22⋊C4—21no—
201C13×C22⋊C4—21no—
202C42×C13—21no—
203C42×C13—21no—
204C42×C13—21no—
205C42×C13—21no—
206C42×C13C22×C411yescharacteristic
207C42×C13C2×D411yescharacteristic
208C42×C13#4111yescharacteristic
209C42×C13C2411yescharacteristic
210#3102C2×C1311yescharacteristic
211#2994C2×C1311yescharacteristic, complemented
212#2990C2×C1311yescharacteristic, complemented
213#1593C2×C1311yescharacteristic, complemented
214#1590C2×C1311yescharacteristic, complemented
215#1587C2×C1311yescharacteristic, complemented
216#1586C2×C1311yescharacteristic, complemented
217#1582C2×C1311yescharacteristic, complemented
218#1582C2×C1311yescharacteristic, complemented
219#1580C2×C1311yescharacteristic, complemented
220C8×SD16C2×C1311yescharacteristic, complemented
221#1570C2×C1311yescharacteristic, complemented
222#1495C2×C1311yescharacteristic, complemented
223#1477C2×C1311yescharacteristic, complemented
224#1454C2×C1311yescharacteristic, complemented
225C23×C13—21no—
226C23×C13—21no—
227C23×C13C4×D411yescharacteristic
228Q8×C13—21no—
229Q8×C13—21no—
230Q8×C13—21no—
231Q8×C13—21no—
232D4×C13—21no—
233D4×C13—21no—
234D4×C13—21no—
235D4×C13—42no—
236D4×C13—42no—
237D4×C13#13112yes—
238C2×C4×C13—21no—
239C2×C4×C13—21no—
240C2×C4×C13—21no—
241C2×C4×C13—21no—
242C2×C4×C13—21no—
243C2×C4×C13—21no—
244C2×C4×C13—21no—
245C2×C4×C13—21no—
246C2×C4×C13—21no—
247C2×C4×C13—21no—
248C2×C4×C13—41no—
249C2×C4×C13—42no—
250C2×C4×C13—42no—
251C2×C4×C13—41no—
252C2×C4×C13—41no—
253C2×C4×C13—41no—
254C2×C4×C13—41no—
255C2×C4×C13C4×D411yescharacteristic
256C2×C4×C13C4×D411yescharacteristic
257C2×C4×C13C4×D411yescharacteristic
258C2×C4×C13C23×C411yescharacteristic
259C2×C4×C13C22×D411yescharacteristic
260C2×C4×C13C2×#4111yescharacteristic
261C8×C13—21no—
262C8×C13—21no—
263C8×C13—21no—
264C8×C13—21no—
265C8×C13—21no—
266C8×C13—21no—
267C8×C13—21no—
268C8×C13—21no—
269C8×C13—41no—
270C8×C13—41no—
271C8×C13—41no—
272C8×C13—41no—
273C8×C13—41no—
274C8×C13—41no—
275#529C22×C1311yescharacteristic
276C4×#41C22×C1311yescharacteristic
277#485C4×C1311yescharacteristic
278#482C4×C1311yescharacteristic
279#479C4×C1311yescharacteristic
280#478C4×C1311yescharacteristic
281#464C4×C1311yescharacteristic
282#463C4×C1311yescharacteristic
283#452C4×C1311yescharacteristic
284#449C4×C1311yescharacteristic
285#446C22×C1311yescharacteristic
286#446C22×C1311yescharacteristic
287#446C22×C1311yescharacteristic
288C8×Q8C22×C1311yescharacteristic
289C4×Q16C22×C1311yescharacteristic
290C4×SD16C22×C1311yescharacteristic
291C4×SD16C22×C1311yescharacteristic
292C4×D8C22×C1311yescharacteristic
293#436C22×C1311yescharacteristic
294#435—21no—
295#435—21no—
296#435—21no—
297C8×D4—21no—
298C8×D4C22×C1311yescharacteristic
299C8×D4C22×C1311yescharacteristic
300C8×D4C22×C1311yescharacteristic
301#433—21no—
302#432—21no—
303#431C22×C1311yescharacteristic
304#431C22×C1311yescharacteristic
305#431C22×C1311yescharacteristic
306#424—21no—
307#423C22×C1311yescharacteristic
308C2×C4⋊C8—21no—
309C2×C4⋊C8C22×C1311yescharacteristic
310#334C22×C1311yescharacteristic
311#334C22×C1311yescharacteristic
312#334C22×C1311yescharacteristic
313#334C22×C1311yescharacteristic
314Q8⋊C8C22×C1311yescharacteristic
315Q8⋊C8C22×C1311yescharacteristic
316Q8⋊C8C22×C1311yescharacteristic
317Q8⋊C8C22×C1311yescharacteristic
318D4⋊C8C22×C1311yescharacteristic
319D4⋊C8C22×C1311yescharacteristic
320D4⋊C8C22×C1311yescharacteristic
321D4⋊C8C22×C1311yescharacteristic
322#322C22×C1311yescharacteristic
323#322C22×C1311yescharacteristic
324#322C22×C1311yescharacteristic
325C82C22×C1311yescharacteristic
326C22×C13—21no—
327C22×C13—22no—
328C22×C13—21no—
329C22×C13—21no—
330C22×C13—41no—
331C22×C13—41no—
332C22×C13—41no—
333C22×C13—41no—
334C22×C13—41no—
335C22×C13C2×C4×D411yescharacteristic
336C4×C13—21no—
337C4×C13—21no—
338C4×C13—21no—
339C4×C13—21no—
340C4×C13—41no—
341C4×C13—41no—
342C4×C13—41no—
343C4×C13—41no—
344C4×C13—41no—
345C4×C13—41no—
346C4×C13C2×#13111yescharacteristic
347C4×C13#56811yescharacteristic
348C4×C13#57711yescharacteristic
349C4×C13#57711yescharacteristic
350C2×#41C2×C4×C1311yescharacteristic
351C2×Q16C2×C4×C1311yescharacteristic
352C2×SD16C2×C4×C1311yescharacteristic
353C2×SD16C2×C4×C1311yescharacteristic
354C2×D8C2×C4×C1311yescharacteristic
355C2×M16—21no—
356C2×M16—21no—
357C22×C8—21no—
358C22×C8—21no—
359C22×C8—21no—
360C22×C8—21no—
361#126—21no—
362#125C2×C4×C1311yescharacteristic
363#124C2×C4×C1311yescharacteristic
364#123—21no—
365C22⋊Q8C2×C4×C1311yescharacteristic
366#121C2×C4×C1311yescharacteristic
367C4×Q8C2×C4×C1311yescharacteristic
368C4×Q8C23×C1311yescharacteristic
369C4×Q8C23×C1311yescharacteristic
370C4×D4—21no—
371C4×D4—21no—
372C4×D4—21no—
373C4×D4C2×C4×C1311yescharacteristic
374C4×D4C23×C1311yescharacteristic
375C4×D4C23×C1311yescharacteristic
376#117—21no—
377#117—21no—
378#117C2×C4×C1311yescharacteristic
379C2×C42—21no—
380C2×C42C23×C1311yescharacteristic
381#107C2×C4×C1311yescharacteristic
382#107C2×C4×C1311yescharacteristic
383#106C2×C4×C1311yescharacteristic
384#106C2×C4×C1311yescharacteristic
385C4⋊C8—21no—
386C4⋊C8—21no—
387C4⋊C8—21no—
388C4⋊C8—21no—
389C4⋊C8—21no—
390C4⋊C8—21no—
391C4⋊C8—21no—
392C4⋊C8C2×C4×C1311yescharacteristic
393C4⋊C8C2×C4×C1311yescharacteristic
394C4⋊C8D4×C1311yescharacteristic
395C4⋊C8D4×C1311yescharacteristic
396C4⋊C8C23×C1311yescharacteristic
397C4⋊C8C23×C1311yescharacteristic
398C4⋊C8C23×C1311yescharacteristic
399C4⋊C8C23×C1311yescharacteristic
400#103C2×C4×C1311yescharacteristic
401#103C2×C4×C1311yescharacteristic
402#103C2×C4×C1311yescharacteristic
403#103C2×C4×C1311yescharacteristic
404#102C2×C4×C1311yescharacteristic
405#102C2×C4×C1311yescharacteristic
406#102C2×C4×C1311yescharacteristic
407#102C2×C4×C1311yescharacteristic
408C22⋊C8—21no—
409C22⋊C8—21no—
410C22⋊C8—21no—
411C22⋊C8—21no—
412C22⋊C8—21no—
413C22⋊C8C2×C4×C1311yescharacteristic
414C22⋊C8C2×C4×C1311yescharacteristic
415C22⋊C8D4×C1311yescharacteristic
416C22⋊C8D4×C1311yescharacteristic
417#97—21no—
418#97—21no—
419#97—21no—
420C4×C8—21no—
421C4×C8C23×C1311yescharacteristic
422C4×C8C23×C1311yescharacteristic
423C4×C8C23×C1311yescharacteristic
424C4×C8C23×C1311yescharacteristic
425C4×C8C23×C1311yescharacteristic
426C4×C8C23×C1311yescharacteristic
427C2×C13—41no—
428C2×C13—42no—
429C2×C13—81no—
430C2×C13#293311yescharacteristic
431C2×C13#295211yescharacteristic
432C2×C13#295511yescharacteristic
433#41—22no—
434#41—41no—
435C2×Q8C22×C4×C1311yescharacteristic
436C2×Q8C22×C4×C1311yescharacteristic
437C2×D4—21no—
438C2×D4—21no—
439C2×D4C22×C4×C1311yescharacteristic
440C2×D4C22×C4×C1311yescharacteristic
441C22×C4—21no—
442C22×C4—21no—
443C22×C4—21no—
444C22×C4—21no—
445C22×C4C22×C4×C1311yescharacteristic
446C22×C4C2×D4×C1311yescharacteristic
447C22×C4C13×#4111yescharacteristic
448Q16—41no—
449SD16—22no—
450SD16—41no—
451D8—22no—
452M16—81no—
453M16—81no—
454C2×C8—21no—
455C2×C8—21no—
456C2×C8—21no—
457C2×C8—21no—
458C2×C8—21no—
459C2×C8—21no—
460C2×C8—81no—
461C2×C8—81no—
462C2×C8—81no—
463C2×C8—81no—
464C2×C8C22×C4×C1311yescharacteristic
465C2×C8C22×C4×C1311yescharacteristic
466C2×C8C22×C4×C1311yescharacteristic
467C2×C8C22×C4×C1311yescharacteristic
468C2×C8C2×D4×C1311yescharacteristic
469C2×C8C2×D4×C1311yescharacteristic
470C2×C8C2×D4×C1311yescharacteristic
471C2×C8C2×D4×C1311yescharacteristic
472C4⋊C4—21no—
473C4⋊C4—21no—
474C4⋊C4—21no—
475C4⋊C4—21no—
476C4⋊C4—21no—
477C4⋊C4—21no—
478C4⋊C4C22×C4×C1311yescharacteristic
479C4⋊C4C22×C4×C1311yescharacteristic
480C4⋊C4C22×C4×C1311yescharacteristic
481C4⋊C4C22×C4×C1311yescharacteristic
482C22⋊C4—21no—
483C22⋊C4—21no—
484C22⋊C4—21no—
485C22⋊C4—21no—
486C22⋊C4—21no—
487C22⋊C4—21no—
488C22⋊C4—21no—
489C22⋊C4—21no—
490C42—21no—
491C42—21no—
492C42—21no—
493C42—21no—
494C42C22×C4×C1311yescharacteristic
495C42C2×D4×C1311yescharacteristic
496C42C13×#4111yescharacteristic
497C42C24×C1311yescharacteristic
498C13#1802911yescharacteristic, direct product factor, Sylow
499C23—21no—
500C23—21no—
501C23C4×D4×C1311yescharacteristic
502Q8—21no—
503Q8—21no—
504Q8—21no—
505Q8—21no—
506D4—21no—
507D4—21no—
508D4—21no—
509D4—42no—
510D4—42no—
511D4C13×#13112yes—
512C2×C4—21no—
513C2×C4—21no—
514C2×C4—21no—
515C2×C4—21no—
516C2×C4—21no—
517C2×C4—21no—
518C2×C4—21no—
519C2×C4—21no—
520C2×C4—21no—
521C2×C4—21no—
522C2×C4—41no—
523C2×C4—42no—
524C2×C4—42no—
525C2×C4—41no—
526C2×C4—41no—
527C2×C4—41no—
528C2×C4—41no—
529C2×C4C4×D4×C1311yescharacteristic
530C2×C4C4×D4×C1311yescharacteristic
531C2×C4C4×D4×C1311yescharacteristic
532C2×C4C23×C4×C1311yescharacteristic
533C2×C4C22×D4×C1311yescharacteristic
534C2×C4C2×C13×#4111yescharacteristic
535C8—21no—
536C8—21no—
537C8—21no—
538C8—21no—
539C8—21no—
540C8—21no—
541C8—21no—
542C8—21no—
543C8—41no—
544C8—41no—
545C8—41no—
546C8—41no—
547C8—41no—
548C8—41no—
549C22—21no—
550C22—22no—
551C22—21no—
552C22—21no—
553C22—41no—
554C22—41no—
555C22—41no—
556C22—41no—
557C22—41no—
558C22C2×C4×D4×C1311yescharacteristic
559C4—21no—
560C4—21no—
561C4—21no—
562C4—21no—
563C4—41no—
564C4—41no—
565C4—41no—
566C4—41no—
567C4—41no—
568C4—41no—
569C4C2×C13×#13111yescharacteristic
570C4C13×#56811yescharacteristic
571C4C13×#57711yescharacteristic
572C4C13×#57711yescharacteristic
573C2—41no—
574C2—42no—
575C2—81no—
576C2C13×#293311yescharacteristic
577C2C13×#295211yescharacteristic
578C2C13×#295511yescharacteristic
subgroupG/H
centerC2×C4×C13C22×D4
commutatorC2×C4C23×C4×C13
Frattini, cosocleC42C24×C13
socleC22×C13C2×C4×D4
prime radicalC13×#449C4
LCSG ▷ C2×C4 ▷ C2 ▷ C1
UCSC1 ◁ C2×C4×C13 ◁ C13×#431 ◁ G

Complements

Splittings G = N ⋊ H with N normal; H ≅ G/N.

NH ≅ G/Ntype
2. C13×#2994C2semidirect
3. C13×#2990C2semidirect
4. C13×#1593C2semidirect
5. C13×#1590C2semidirect
6. C13×#1587C2semidirect
7. C13×#1586C2semidirect
8. C13×#1582C2semidirect
9. C13×#1582C2semidirect
10. C13×#1580C2semidirect
11. C8×C13×SD16C2semidirect
12. C13×#1570C2semidirect
13. C13×#1495C2semidirect
14. C13×#1477C2semidirect
15. C13×#1454C2semidirect
144. #18029C13direct (N × H)
211. #2994C2×C13semidirect
212. #2990C2×C13semidirect
213. #1593C2×C13semidirect
214. #1590C2×C13semidirect
215. #1587C2×C13semidirect
216. #1586C2×C13semidirect
217. #1582C2×C13semidirect
218. #1582C2×C13semidirect
219. #1580C2×C13semidirect
220. C8×SD16C2×C13semidirect
221. #1570C2×C13semidirect
222. #1495C2×C13semidirect
223. #1477C2×C13semidirect
224. #1454C2×C13semidirect
498. C13#18029direct (N × H)

Maximal subgroups

By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.

subgroupindex
C13×#31022
C13×#29942
C13×#29902
C13×#15932
C13×#15902
C13×#15872
C13×#15862
C13×#15822
C13×#15802
C8×C13×SD162
C13×#15702
C13×#14952
C13×#14772
C13×#14542
#1802913