Finite Group Databasebeta

← C2×#20257253 #27124357

Subgroups — C2×#20257253 #27124357

Order 12032.

7130 conjugacy classes of subgroups.

The subgroup lattice has 636 nodes — too large to display as a diagram.

Conjugacy classes of subgroups

#subgroupG/Hclass sizemultiplicitynormal?properties
1#20257253C2132yesmaximal, direct product factor
2C2×#15689858C212yesmaximal, complemented
3C2×#15689851C212yesmaximal, complemented
4C2×#15689846C212yesmaximal, complemented
5C2×#15689845C214yesmaximal, complemented
6C2×#15689833C212yesmaximal, complemented
7C2×#15689814C214yesmaximal, complemented
8C2×#15689720C214yesmaximal, complemented
9C2×#15689697C212yesmaximal, complemented
10C2×#15689680C211yesmaximal, characteristic, complemented
11C2×#15689673C211yesmaximal, characteristic
12C2×#15689657C214yesmaximal, complemented
13C2×#15689604C212yesmaximal, complemented
14C22×C4×Q8×C47C211yesmaximal, characteristic, complemented
15C22×#10625350C2212yes—
16#15689858C22132yescomplemented
17#15689851C22132yescomplemented
18#15689846C22132yescomplemented
19#15689845C22164yescomplemented
20#15689833C22132yescomplemented
21#15689814C22164yescomplemented
22#15689720C22164yescomplemented
23#15689697C22132yescomplemented
24#15689680C22116yescomplemented
25#15689673C22116yes—
26C2×#13094024C2211yescharacteristic
27C2×#13094024C2211yescharacteristic
28C2×#13094024C2211yescharacteristic
29C2×#13094022C2214yes—
30C2×#13094021C2211yescharacteristic
31#15689657C22164yescomplemented
32C2×#13094019C2218yes—
33C2×#13094018C2218yes—
34C2×#13094016C2212yes—
35C2×#13094016C2214yes—
36C2×#13094014C2218yes—
37C2×#13094013C2214yes—
38C2×#13094012C2214yes—
39C2×#13094012C2212yes—
40C2×#13094009C2218yes—
41C2×#13094007C2218yes—
42C2×#13094003C2212yes—
43C2×#13094003C2212yes—
44C2×#13094002C2218yes—
45C2×#13094000C2214yes—
46C2×#13094000C2214yes—
47C2×#13093998C2212yes—
48C2×#13093998C2212yes—
49#15689604C22132yescomplemented
50C2×C4×Dic94C2214yes—
51C2×C4×Dic94C2212yes—
52C2×C4×Dic94C2212yes—
53C2×#13093989C2214yes—
54C2×C4×D188C2212yes—
55C2×C4×D188C2214yes—
56C2×C4×D188C2212yes—
57C2×#13093986C2214yes—
58C2×C4×C22⋊D47C2218yes—
59C2×#13093983C2212yes—
60C2×#13093982C2214yes—
61C2×#13093981C2218yes—
62C2×C4⋊C4×D47C2214yes—
63C23×Q8×C47C2211yescharacteristic
64C2×C4×Q8×C47C2212yes—
65C2×C4×Q8×C47C2212yes—
66C2×C4×Q8×C47C2212yes—
67C2×C4×Q8×C47C2212yes—
68C2×C4×Q8×C47C22116yescomplemented
69C22×C4⋊C4×C47C2211yescharacteristic
70C22×C4⋊C4×C47C2212yes—
71C22×C42×C47C2212yes—
72C22×C42×C47C2211yescharacteristic
73C2×#10625350—216no—
74C2×#10625350C23116yes—
75C22×Dic94C2312yes—
76C22×Dic94C2312yes—
77C22×Dic94C2312yes—
78C22×D188C2312yes—
79C22×D188C2312yes—
80C22×D188C2312yes—
81C22×C22⋊D47C2314yes—
82C22×C4×D47C2314yes—
83C22×C4×D47C2318yes—
84#13094024C2318yes—
85#13094024C2318yes—
86#13094024C2318yes—
87#13094022C23132yes—
88#13094021C2318yes—
89#13094019C23164yes—
90#13094018C23164yes—
91#13094016C23116yes—
92#13094016C23132yes—
93#13094014C23164yes—
94#13094013C23132yes—
95#13094012C23116yes—
96#13094012C23132yes—
97#13094009C23164yes—
98#13094007C23164yes—
99#13094003C23116yes—
100#13094003C23116yes—
101#13094002C23164yes—
102#13094000C23132yes—
103#13094000C23132yes—
104#13093998C23116yes—
105#13093998C23116yes—
106C4×Dic94C23116yes—
107C4×Dic94C23132yes—
108C4×Dic94C23116yes—
109#13093989C23132yes—
110C4×D188C23116yes—
111C4×D188C23116yes—
112C4×D188C23132yes—
113#13093986C23132yes—
114C4×C22⋊D47C23164yes—
115#13093983C23116yes—
116#13093982C23132yes—
117#13093981C23164yes—
118C2×C4⋊Dic47C2312yes—
119C2×C4⋊Dic47C2312yes—
120C2×C4⋊Dic47C2312yes—
121C2×C4⋊Dic47C2312yes—
122C2×C4⋊Dic47C2312yes—
123C2×C4⋊Dic47C2312yes—
124C2×Dic47⋊C4C2318yes—
125C2×Dic47⋊C4C2314yes—
126C2×Dic47⋊C4C2318yes—
127C2×Dic47⋊C4C2318yes—
128C2×Dic47⋊C4C2314yes—
129C4⋊C4×D47C23132yes—
130C2×C22⋊Dic47C2314yes—
131C2×(C2×D47)⋊C4C2314yes—
132C2×(C2×D47)⋊C4C2318yes—
133C2×(C2×D47)⋊C4C2318yes—
134C2×(C2×D47)⋊C4C2314yes—
135C2×(C2×D47)⋊C4C2318yes—
136C2×C4×Dic47C2318yes—
137C2×C4×Dic47C2314yes—
138C22×Q8×C47—28no—
139C22×Q8×C47C2312yes—
140C22×Q8×C47C2312yes—
141C22×Q8×C47C2318yes—
142C23×C4×C47C2311yescharacteristic
143C23×C4×C47C2312yes—
144C23×C4×C47C2312yes—
145C23×C4×C47C2311yescharacteristic
146C23×C4×C47C2311yescharacteristic
147C4×Q8×C47C23116yes—
148C4×Q8×C47C23116yes—
149C4×Q8×C47C23116yes—
150C4×Q8×C47C23116yes—
151C2×C4⋊C4×C47C2312yes—
152C2×C4⋊C4×C47C2312yes—
153C2×C4⋊C4×C47C2314yes—
154C2×C4⋊C4×C47C2314yes—
155C2×C4⋊C4×C47C2318yes—
156C2×C4⋊C4×C47C23116yes—
157C2×C42×C47C2314yes—
158C2×C42×C47C2311yescharacteristic
159C2×C42×C47C2311yescharacteristic
160C2×C42×C47C2314yes—
161C2×C42×C47C2311yescharacteristic
162C2×C42×C47C2311yescharacteristic
163C2×C42×C47C23116yes—
164C2×C42×C47C2318yes—
165C24×C47C2411yescharacteristic
166C23×D47C2414yes—
167C2×Q8×C47—28no—
168C2×Q8×C47—28no—
169C2×Q8×C47—232no—
170C2×Q8×C47C2418yes—
171C2×Q8×C47C2418yes—
172C22×C4×C47—28no—
173C22×C4×C47—24no—
174C22×C4×C47—42no—
175C22×C4×C47—44no—
176C22×C4×C47#4118yes—
177C22×C4×C47C2411yescharacteristic
178C22×C4×C47C2414yes—
179C22×C4×C47C2414yes—
180C22×C4×C47C2411yescharacteristic
181C22×C4×C47C2411yescharacteristic
182C22×C4×C47C2414yes—
183C22×C4×C47C2418yes—
184C22×C4×C47C2418yes—
185C22×C4×C47C2414yes—
186C22×C4×C47C2411yescharacteristic
187C22×C4×C47C2411yescharacteristic
188C22×C4×C47C2414yes—
189C22×C4×C47C2411yescharacteristic
190C2×C22⋊D47—216no—
191C2×C22⋊D47C24116yes—
192C22×Dic47C2414yes—
193C22×Dic47C2414yes—
194C22×Dic47C2414yes—
195#10625350—264no—
196C2×D188—28no—
197C2×D188—28no—
198C2×D188—44no—
199C2×D188C2418yes—
200C2×D188C2418yes—
201C2×D188C2418yes—
202C2×C4×D47—216no—
203C2×C4×D47—416no—
204C2×C4×D47C24116yes—
205C2×C4×D47C24132yes—
206C2×Dic94—28no—
207C2×Dic94—28no—
208C2×Dic94—44no—
209C2×Dic94C2418yes—
210C2×Dic94C2418yes—
211C2×Dic94C2418yes—
212C4⋊C4×C47C2418yes—
213C4⋊C4×C47C2418yes—
214C4⋊C4×C47C24116yes—
215C4⋊C4×C47C24116yes—
216C42×C47C24116yes—
217C42×C47C2414yes—
218C42×C47C2414yes—
219C42×C47C24116yes—
220C42×C47C2414yes—
221C42×C47C2414yes—
222C22⋊Dic47C24116yes—
223(C2×D47)⋊C4C24116yes—
224(C2×D47)⋊C4C24132yes—
225(C2×D47)⋊C4C24132yes—
226(C2×D47)⋊C4C24116yes—
227(C2×D47)⋊C4C24132yes—
228C4⋊Dic47C2418yes—
229C4⋊Dic47C2418yes—
230C4⋊Dic47C2418yes—
231C4⋊Dic47C2418yes—
232C4⋊Dic47C2418yes—
233C4⋊Dic47C2418yes—
234Dic47⋊C4C24132yes—
235Dic47⋊C4C24116yes—
236Dic47⋊C4C24132yes—
237Dic47⋊C4C24132yes—
238Dic47⋊C4C24116yes—
239C4×Dic47C24132yes—
240C4×Dic47C24116yes—
241C23×C47—22no—
242C23×C47—22no—
243C23×C47C2×#4114yes—
244C23×C47C2512yes—
245C23×C47C2511yescharacteristic
246C22×D47—28no—
247C22×D47—28no—
248C22×D47—28no—
249C22×D47C2518yes—
250Q8×C47—216no—
251Q8×C47—216no—
252C2×C4×C47—216no—
253C2×C4×C47—28no—
254C2×C4×C47—22no—
255C2×C4×C47—22no—
256C2×C4×C47—28no—
257C2×C4×C47—22no—
258C2×C4×C47—28no—
259C2×C4×C47—44no—
260C2×C4×C47—48no—
261C2×C4×C47C2×#4114yes—
262C2×C4×C47C2×#4114yes—
263C2×C4×C47C2×#41116yes—
264C2×C4×C472−1+414yes—
265C2×C4×C47C2518yes—
266C2×C4×C47C2512yes—
267C2×C4×C47C2512yes—
268C2×C4×C47C2518yes—
269C2×C4×C47C2512yes—
270C2×C4×C47C2512yes—
271C2×C4×C47C2512yes—
272C2×C4×C47C2512yes—
273C22⋊D47—232no—
274C2×Dic47—28no—
275C2×Dic47—28no—
276C2×Dic47—28no—
277C2×Dic47C2518yes—
278C2×Dic47C2518yes—
279C2×Dic47C2518yes—
280D188—216no—
281D188—216no—
282D188—48no—
283C4×D47—232no—
284C4×D47—432no—
285Dic94—216no—
286Dic94—216no—
287Dic94—48no—
288C2×#3507—471nomaximal, Sylow
289C22×C47—22no—
290C22×C47—22no—
291C22×C47—28no—
292C22×C47C22×#4114yes—
293C22×C47C22×#4112yes—
294C22×C47C2×2−1+412yes—
295C22×C47#58512yes—
296C22×C47C2611yescharacteristic
297C2×D47—28no—
298C2×D47—28no—
299C2×D47—28no—
300C2×D47—416no—
301C4×C47—28no—
302C4×C47—22no—
303C4×C47—22no—
304C4×C47—28no—
305C4×C47—22no—
306C4×C47C22×#4114yes—
307C4×C47C22×#4114yes—
308C4×C47C2×2−1+414yes—
309Dic47—28no—
310Dic47—28no—
311Dic47—28no—
312#3507—4732no—
313C2×#559—472no—
314C2×#557—472no—
315C2×#556—474no—
316C2×#556—472no—
317C2×#554—472no—
318C2×#552—474no—
319C2×#539—474no—
320C2×#536—472no—
321C2×#533—471no—
322C2×#532—471no—
323C2×#529—474no—
324C2×#520—472no—
325C22×C4×Q8D4711yescharacteristic, complemented
326C2×C47—24no—
327C2×C47#350714yescomplemented
328C2×C47C23×#4111yescharacteristic
329C2×C47C22×2−1+411yescharacteristic
330C2×C47C2×#58511yescharacteristic
331D47—48no—
332C22×#41—472no—
333C23×Q8C2×D4711yescharacteristic
334#559—4732no—
335#557—4732no—
336#556—4764no—
337#556—4732no—
338#554—4732no—
339#552—4764no—
340#539—4764no—
341#536—4732no—
342#533—4716no—
343#532—4716no—
344C2×C4⋊Q8—474no—
345C2×C4⋊Q8—471no—
346C2×C4⋊Q8—471no—
347C2×C4⋊Q8—471no—
348C2×#127—471no—
349#529—4764no—
350C2×#126—478no—
351C2×#126—478no—
352C2×#125—478no—
353C2×#125—474no—
354C2×#125—472no—
355C2×#124—474no—
356C2×#124—474no—
357C2×#124—472no—
358C2×#123—478no—
359C2×#123—478no—
360C2×C22⋊Q8—474no—
361C2×C22⋊Q8—474no—
362C2×C22⋊Q8—472no—
363C2×C22⋊Q8—472no—
364C2×C22⋊Q8—478no—
365C2×#121—472no—
366C2×#121—472no—
367#520—4732no—
368C2×C4×Q8—474no—
369C2×C4×Q8—474no—
370C2×C4×Q8—472no—
371C2×C4×Q8—472no—
372C2×C4×Q8C2×D4712yes—
373C2×C4×Q8C2×D4712yes—
374C2×C4×Q8C2×D4712yes—
375C2×C4×Q8C2×D4712yes—
376C2×C4×Q8C2×D47116yescomplemented
377C2×C4×D4—478no—
378C2×C4×D4—474no—
379C2×C4×D4—474no—
380C2×C4×D4—472no—
381C2×C4×D4—472no—
382C2×#117—472no—
383C2×#117—474no—
384C2×#117—478no—
385C22×C4⋊C4—474no—
386C22×C4⋊C4C2×D4711yescharacteristic
387C22×C4⋊C4C2×D4712yes—
388C22×C42C2×D4712yes—
389C22×C42C2×D4711yescharacteristic
390C47C2×#350711yescharacteristic, complemented, Sylow
391C2×#41—4716no—
392C2×#41—9416no—
393C22×Q8—28no—
394C22×Q8—472no—
395C22×Q8—472no—
396C22×Q8—472no—
397C22×Q8C22×D4712yes—
398C22×Q8C22×D4712yes—
399C22×Q8C22×D4718yes—
400C22×D4—474no—
401C22×D4—472no—
402C22×D4—472no—
403C22×D4—472no—
404C23×C4—474no—
405C23×C4—478no—
406C23×C4C22×D4712yes—
407C23×C4C22×D4711yescharacteristic
408C23×C4C22×D4712yes—
409C23×C4C22×D4711yescharacteristic
410C23×C4C22×D4711yescharacteristic
411C4⋊Q8—4732no—
412C4⋊Q8—478no—
413C4⋊Q8—478no—
414C4⋊Q8—478no—
415#127—478no—
416#126—4764no—
417#126—4764no—
418#125—4764no—
419#125—4732no—
420#125—4716no—
421#124—4732no—
422#124—4732no—
423#124—4716no—
424#123—4764no—
425#123—4764no—
426C22⋊Q8—4732no—
427C22⋊Q8—4732no—
428C22⋊Q8—4716no—
429C22⋊Q8—4716no—
430C22⋊Q8—4764no—
431#121—4716no—
432#121—4716no—
433C4×Q8—4732no—
434C4×Q8—4732no—
435C4×Q8—4716no—
436C4×Q8—4716no—
437C4×Q8C22×D47116yes—
438C4×Q8C22×D47116yes—
439C4×Q8C22×D47116yes—
440C4×Q8C22×D47116yes—
441C4×D4—4764no—
442C4×D4—4732no—
443C4×D4—4732no—
444C4×D4—4716no—
445C4×D4—4716no—
446#117—4716no—
447#117—4732no—
448#117—4764no—
449C2×C4⋊C4—472no—
450C2×C4⋊C4—478no—
451C2×C4⋊C4—472no—
452C2×C4⋊C4—474no—
453C2×C4⋊C4—478no—
454C2×C4⋊C4—472no—
455C2×C4⋊C4—472no—
456C2×C4⋊C4—472no—
457C2×C4⋊C4—474no—
458C2×C4⋊C4—478no—
459C2×C4⋊C4—472no—
460C2×C4⋊C4—4732no—
461C2×C4⋊C4C22×D4712yes—
462C2×C4⋊C4C22×D4712yes—
463C2×C4⋊C4C22×D4714yes—
464C2×C4⋊C4C22×D4714yes—
465C2×C4⋊C4C22×D4718yes—
466C2×C4⋊C4C22×D47116yes—
467C2×C22⋊C4—474no—
468C2×C22⋊C4—474no—
469C2×C22⋊C4—478no—
470C2×C22⋊C4—478no—
471C2×C22⋊C4—474no—
472C2×C22⋊C4—478no—
473C2×C42—478no—
474C2×C42—474no—
475C2×C42C22×D4714yes—
476C2×C42C22×D4711yescharacteristic
477C2×C42C22×D4711yescharacteristic
478C2×C42C22×D4714yes—
479C2×C42C22×D4711yescharacteristic
480C2×C42C22×D4711yescharacteristic
481C2×C42C22×D47116yes—
482C2×C42C22×D4718yes—
483C24—474no—
484C24C23×D4711yescharacteristic
485#41—9464no—
486C2×Q8—28no—
487C2×Q8—28no—
488C2×Q8—232no—
489C2×Q8—478no—
490C2×Q8—478no—
491C2×Q8—478no—
492C2×Q8—948no—
493C2×Q8—948no—
494C2×Q8—1884no—
495C2×Q8C23×D4718yes—
496C2×Q8C23×D4718yes—
497C2×D4—4716no—
498C2×D4—478no—
499C2×D4—478no—
500C2×D4—478no—
501C2×D4—9416no—
502C2×D4—948no—
503C2×D4—948no—
504C2×D4—1884no—
505C22×C4—28no—
506C22×C4—24no—
507C22×C4—44no—
508C22×C4—42no—
509C22×C4—474no—
510C22×C4—474no—
511C22×C4—474no—
512C22×C4—4716no—
513C22×C4—4732no—
514C22×C4—9416no—
515C22×C4—18816no—
516C22×C4#1062535018yes—
517C22×C4C23×D4714yes—
518C22×C4C23×D4718yes—
519C22×C4C23×D4714yes—
520C22×C4C23×D4711yescharacteristic
521C22×C4C23×D4714yes—
522C22×C4C23×D4711yescharacteristic
523C22×C4C23×D4711yescharacteristic
524C22×C4C23×D4718yes—
525C22×C4C23×D4714yes—
526C22×C4C23×D4714yes—
527C22×C4C23×D4711yescharacteristic
528C22×C4C23×D4711yescharacteristic
529C22×C4C23×D4711yescharacteristic
530C4⋊C4—4732no—
531C4⋊C4—4716no—
532C4⋊C4—4732no—
533C4⋊C4—4716no—
534C4⋊C4—4732no—
535C4⋊C4—478no—
536C4⋊C4—478no—
537C4⋊C4—478no—
538C4⋊C4—478no—
539C4⋊C4—478no—
540C4⋊C4—478no—
541C4⋊C4C23×D4718yes—
542C4⋊C4C23×D4718yes—
543C4⋊C4C23×D47116yes—
544C4⋊C4C23×D47116yes—
545C22⋊C4—4716no—
546C22⋊C4—4716no—
547C22⋊C4—4732no—
548C22⋊C4—4732no—
549C22⋊C4—4716no—
550C22⋊C4—4732no—
551C42—4732no—
552C42—4716no—
553C42C23×D47116yes—
554C42C23×D4714yes—
555C42C23×D4714yes—
556C42C23×D47116yes—
557C42C23×D4714yes—
558C42C23×D4714yes—
559C23—22no—
560C23—22no—
561C23—478no—
562C23—948no—
563C23—948no—
564C23—948no—
565C23C2×#1062535014yes—
566C23C24×D4712yes—
567C23C24×D4711yescharacteristic
568Q8—216no—
569Q8—216no—
570Q8—9416no—
571Q8—9416no—
572Q8—1888no—
573D4—9432no—
574D4—9416no—
575D4—9416no—
576D4—1888no—
577C2×C4—216no—
578C2×C4—28no—
579C2×C4—22no—
580C2×C4—28no—
581C2×C4—22no—
582C2×C4—22no—
583C2×C4—28no—
584C2×C4—48no—
585C2×C4—44no—
586C2×C4—478no—
587C2×C4—478no—
588C2×C4—478no—
589C2×C4—948no—
590C2×C4—948no—
591C2×C4—948no—
592C2×C4—9432no—
593C2×C4—18832no—
594C2×C4C2×#1062535014yes—
595C2×C4C2×#1062535014yes—
596C2×C4C2×#10625350116yes—
597C2×C4#1309407214yes—
598C2×C4C24×D4718yes—
599C2×C4C24×D4712yes—
600C2×C4C24×D4718yes—
601C2×C4C24×D4712yes—
602C2×C4C24×D4712yes—
603C2×C4C24×D4712yes—
604C2×C4C24×D4712yes—
605C2×C4C24×D4712yes—
606C22—22no—
607C22—22no—
608C22—28no—
609C22—948no—
610C22—948no—
611C22—948no—
612C22—18816no—
613C22C22×#1062535014yes—
614C22C22×#1062535012yes—
615C22C2×#1309407212yes—
616C22#1568995912yes—
617C22C25×D4711yescharacteristic
618C4—28no—
619C4—22no—
620C4—28no—
621C4—22no—
622C4—22no—
623C4—948no—
624C4—948no—
625C4—948no—
626C4C22×#1062535014yes—
627C4C22×#1062535014yes—
628C4C2×#1309407214yes—
629C2—24no—
630C2—1888no—
631C2#2025725314yesdirect product factor
632C2C23×#1062535011yescharacteristic
633C2C22×#1309407211yescharacteristic
634C2C2×#1568995911yescharacteristic
subgroupG/H
centerC23C24×D47
commutator, cosocleC22×C47C26
FrattiniC22C25×D47
FittingC22×C4×Q8×C47C2
socleC23×C47C25
prime radicalC2×#15689673C2
hypercenterC22×C4×Q8D47
hypocenterC47C2×#3507
LCSG ▷ C22×C47 ▷ C47
UCSC1 ◁ C23 ◁ C22×C4×Q8

Complements

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

NH ≅ G/Ntype
1. #20257253C2direct (N × H)
2. C2×#15689858C2semidirect
3. C2×#15689851C2semidirect
4. C2×#15689846C2semidirect
5. C2×#15689845C2semidirect
6. C2×#15689833C2semidirect
7. C2×#15689814C2semidirect
8. C2×#15689720C2semidirect
9. C2×#15689697C2semidirect
10. C2×#15689680C2semidirect
12. C2×#15689657C2semidirect
13. C2×#15689604C2semidirect
14. C22×C4×Q8×C47C2semidirect
16. #15689858C22semidirect
17. #15689851C22semidirect
18. #15689846C22semidirect
19. #15689845C22semidirect
20. #15689833C22semidirect
21. #15689814C22semidirect
22. #15689720C22semidirect
23. #15689697C22semidirect
24. #15689680C22semidirect
31. #15689657C22semidirect
49. #15689604C22semidirect
68. C2×C4×Q8×C47C22semidirect
325. C22×C4×Q8D47semidirect
327. C2×C47#3507semidirect
376. C2×C4×Q8C2×D47semidirect
390. C47C2×#3507semidirect
631. C2#20257253direct (N × H)

Maximal subgroups

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

subgroupindex
#202572532
C2×#156898582
C2×#156898512
C2×#156898462
C2×#156898452
C2×#156898332
C2×#156898142
C2×#156897202
C2×#156896972
C2×#156896802
C2×#156896732
C2×#156896572
C2×#156896042
C22×C4×Q8×C472
C2×#350747