Finite Group Databasebeta

← #30570384

Subgroups — #30570384

Order 15616.

1716 conjugacy classes of subgroups.

The subgroup lattice has 726 nodes — too large to display as a diagram.

Conjugacy classes of subgroups

#subgroupG/Hclass sizemultiplicitynormal?properties
1#21460230C211yesmaximal, characteristic, complemented
2#21459622C211yesmaximal, characteristic, complemented
3#21458730C214yesmaximal, complemented
4#21458722C212yesmaximal, complemented
5#21458669C212yesmaximal, complemented
6#21458573C214yesmaximal, complemented
7#21458541C212yesmaximal, complemented
8#21458472C212yesmaximal, complemented
9#21457106C214yesmaximal, complemented
10#21457019C211yesmaximal, characteristic, complemented
11#21456974C211yesmaximal, characteristic, complemented
12#21456004C214yesmaximal, complemented
13#21455819C211yesmaximal, characteristic
14#21454916C211yesmaximal, characteristic, complemented
15C61×#3110C211yesmaximal, characteristic, complemented
16#16840516—22no—
17#16840497C2212yescomplemented
18Q8×Dic122C2212yescomplemented
19#16840486C2212yescomplemented
20#16840485—21no—
21#16840471—22no—
22#16840471C2214yes—
23#16840469—21no—
24#16840469C2212yes—
25Q8×D244—21no—
26D4×Dic122—21no—
27D4×Dic122C2212yes—
28#16840427C2212yescomplemented
29#16840393C2212yes—
30#16840388—22no—
31#16840385C2214yes—
32#16840383—22no—
33#16840335—22no—
34#16840319C2211yescharacteristic
35#16840319C2211yescharacteristic
36#16840312C2211yescharacteristic
37C2×#14519756—22no—
38#16840237C2212yes—
39#16840171C2212yescomplemented
40#16840170C2214yescomplemented
41#16840166C2214yescomplemented
42#16840165C2211yescharacteristic, complemented
43#16840158C2211yescharacteristic, complemented
44#16840127C2212yescomplemented
45#16840123C2214yescomplemented
46#16840118C2214yescomplemented
47#16840112C2211yescharacteristic, complemented
48#16840112C2211yescharacteristic, complemented
49#16840100C2214yes—
50#16840087C2214yes—
51#16840075C2212yes—
52#16840069C2214yescomplemented
53#16840067C2214yescomplemented
54#16840065C2214yescomplemented
55#16840055C2214yescomplemented
56#16840053C2212yescomplemented
57#16840050C2214yes—
58#16840043C2212yescomplemented
59#16840042C2212yes—
60#16840041C2214yescomplemented
61#16840040C2214yes—
62#16839979C2214yes—
63#16839979C2214yes—
64#16839957C2212yes—
65#16839896C2212yes—
66#16839890C2214yescomplemented
67#16839889C2212yescomplemented
68#16839886C2212yescomplemented
69#16839871C2214yes—
70#16839863C2214yes—
71SD16×Dic61C2214yes—
72C4×#11758199C2212yes—
73C4×#11758199C2212yes—
74#16839842C2214yes—
75#16839820C2214yes—
76#16839815C2211yescharacteristic
77C61×#533C2211yescharacteristic
78C2×C4×D4×C61C2211yescharacteristic
79C61×#484C2212yes—
80C61×#474C2212yes—
81C61×#461C2212yes—
82C61×#450C2212yes—
83C61×#440C2214yes—
84C61×#432C2211yescharacteristic
85C2×#11758222—21no—
86C22×Dic122—22no—
87C2×Q8×D61—22no—
88C2×#11758199C2312yes—
89C2×#11758199C2312yes—
90#14519777—22no—
91#14519777D411yescharacteristic
92#14519777D411yescharacteristic
93#14519777C2311yescharacteristic
94#14519777C2311yescharacteristic
95#14519777C2311yescharacteristic
96#14519776—22no—
97#14519776—24no—
98#14519776C2314yes—
99#14519776C2314yes—
100#14519774C2311yescharacteristic
101#14519772—24no—
102#14519772—24no—
103#14519769D412yes—
104#14519769C2312yes—
105#14519768—22no—
106#14519768C2314yes—
107#14519766C2314yes—
108#14519765—22no—
109#14519765—21no—
110#14519763—24no—
111#14519762—24no—
112#14519759—24no—
113#14519757—22no—
114#14519757—24no—
115#14519756—21no—
116#14519756—21no—
117#14519756—22no—
118#14519756—24no—
119#14519756—22no—
120#14519756—24no—
121#14519756D412yes—
122#14519756D412yes—
123#14519755—24no—
124#14519754—24no—
125#14519754—24no—
126#14519754—24no—
127#14519754—24no—
128#14519753—22no—
129#14519751—21no—
130#14519751C2312yes—
131Q8×Dic61C2314yes—
132C4×Dic122—22no—
133C4×Dic122—21no—
134C4×Dic122—21no—
135C4×Dic122C2312yes—
136C4×Dic122C2312yes—
137C4×D244—21no—
138C4×D244—22no—
139C4×D244C2312yes—
140D4×Dic61—22no—
141D4×Dic61—22no—
142D4×Dic61C2314yes—
143D4×Dic61C2314yes—
144#14519739C2314yes—
145#14519736C2312yes—
146#14519736C2312yes—
147#14519735—22no—
148C2×C4⋊Dic61—22no—
149C2×#11758196—24no—
150C2×C22⋊Dic61—24no—
151#14519711C2314yes—
152#14519710C2314yes—
153#14519710C2312yes—
154#14519710C2312yes—
155#14519709C2314yes—
156#14519708C2314yes—
157C4⋊#92418C2312yes—
158#14519706C2314yes—
159#14519706C2314yes—
160#14519701C2314yes—
161#14519701C2314yes—
162#14519699C2314yes—
163#14519699C2314yes—
164#14519698C2312yes—
165#14519698C2312yes—
166#14519697C2312yes—
167#14519697C2312yes—
168C22⋊#92418C2312yes—
169#14519687C2314yes—
170C4×#92418C2311yescharacteristic
171C4×#92418C2311yescharacteristic
172C8×Dic61C2314yes—
173C22×D4×C61C2311yescharacteristic
174C23×C4×C61—21no—
175C2×SD16×C61C2314yes—
176C4⋊Q8×C61C2311yescharacteristic
177C4⋊Q8×C61C2311yescharacteristic
178#125×C61—21no—
179C22⋊Q8×C61—21no—
180C22⋊Q8×C61C2312yes—
181C4×Q8×C61—21no—
182C4×Q8×C61C2312yes—
183C4×D4×C61—21no—
184C4×D4×C61—21no—
185C4×D4×C61C2312yes—
186C4×D4×C61C2312yes—
187#117×C61—21no—
188C2×C4⋊C4×C61C2311yescharacteristic
189C2×C22⋊C4×C61—21no—
190C2×C42×C61C2311yescharacteristic
191#107×C61C2314yes—
192C4⋊C8×C61C2312yes—
193#103×C61C2314yes—
194#102×C61C2314yes—
195C22⋊C8×C61C2312yes—
196#97×C61C2312yes—
197C24×C61—21no—
198C2×Q8×C61—21no—
199C2×Q8×C61C2412yes—
200C2×D4×C61—24no—
201C2×D4×C61—21no—
202C2×D4×C61C2412yes—
203C22×C4×C61—21no—
204C22×C4×C61—22no—
205C22×C4×C61—22no—
206C22×C4×C61—82no—
207C22×C4×C61C2×D411yescharacteristic
208C22×C4×C61C2×D411yescharacteristic
209C22×C4×C61C2411yescharacteristic
210C2×C22⋊D61—22no—
211C22×Dic61—24no—
212C22×Dic61—24no—
213Q8×D61—84no—
214#11758222—82no—
215C2×D244—21no—
216C2×D244—21no—
217C2×D244C2412yes—
218C2×C4×D61—22no—
219C2×C4×D61—24no—
220C2×Dic122—21no—
221C2×Dic122—21no—
222C2×Dic122—21no—
223C2×Dic122—24no—
224C2×Dic122—24no—
225C2×Dic122—84no—
226C2×Dic122C2×D412yes—
227C2×Dic122C2×D412yes—
228SD16×C61—28no—
229C2×C8×C61C2414yes—
230C4⋊C4×C61—21no—
231C4⋊C4×C61—21no—
232C4⋊C4×C61—21no—
233C4⋊C4×C61—21no—
234C4⋊C4×C61—22no—
235C4⋊C4×C61—22no—
236C4⋊C4×C61C2412yes—
237C4⋊C4×C61C2412yes—
238C22⋊C4×C61—22no—
239C22⋊C4×C61—22no—
240C22⋊C4×C61—22no—
241C42×C61—22no—
242C42×C61C2×D411yescharacteristic
243C42×C61C2×D411yescharacteristic
244C42×C61C2411yescharacteristic
245C42×C61C2411yescharacteristic
246C22⋊Dic61—22no—
247C22⋊Dic61—24no—
248C22⋊Dic61—24no—
249C22⋊Dic61C2×D414yes—
250#11758199—24no—
251#11758199—24no—
252#11758198—22no—
253#11758198—22no—
254#11758198—24no—
255#11758198—24no—
256#11758198—24no—
257C4⋊Dic61—21no—
258C4⋊Dic61—21no—
259C4⋊Dic61—21no—
260C4⋊Dic61—24no—
261C4⋊Dic61—24no—
262C4⋊Dic61C2×D412yes—
263C4⋊Dic61C2×D412yes—
264C4⋊Dic61C2×D412yes—
265C4⋊Dic61C2×D412yes—
266C4⋊Dic61C2412yes—
267C4⋊Dic61C2412yes—
268C4⋊Dic61C2412yes—
269#11758196—22no—
270#11758196—22no—
271#11758196—24no—
272#11758196—24no—
273#11758196—24no—
274#11758196C2×D414yes—
275#11758196C2×D414yes—
276C4×Dic61—22no—
277C4×Dic61—24no—
278C4×Dic61C2414yes—
279C2×#92418C2412yes—
280C2×#92418C2412yes—
281C23×C61—24no—
282C23×C61—22no—
283C23×C61—81no—
284C23×C61—81no—
285C23×C61C22×D411yescharacteristic
286C22×D61—22no—
287Q8×C61—24no—
288Q8×C61—42no—
289D4×C61—24no—
290D4×C61—22no—
291D4×C612−1+414yes—
292C2×C4×C61—22no—
293C2×C4×C61—22no—
294C2×C4×C61—22no—
295C2×C4×C61—22no—
296C2×C4×C61—22no—
297C2×C4×C61—41no—
298C2×C4×C61—44no—
299C2×C4×C61—82no—
300C2×C4×C61—81no—
301C2×C4×C61C22×D411yescharacteristic
302C2×C4×C61C22×D411yescharacteristic
303C2×C4×C61C22×D411yescharacteristic
304C2×C4×C61C22×D411yescharacteristic
305C2×C4×C61C22×D411yescharacteristic
306C2×C4×C61C2511yescharacteristic
307C22⋊D61—82no—
308C2×Dic61—22no—
309C2×Dic61—22no—
310C2×Dic61—22no—
311C2×Dic61—84no—
312C2×Dic61—84no—
313C2×Dic61C22×D414yes—
314C2×Dic61C22×D414yes—
315D244—22no—
316D244—22no—
317D244—42no—
318D244—81no—
319C4×D61—44no—
320C4×D61—84no—
321Dic122—24no—
322Dic122—42no—
323Dic122—42no—
324Dic122—84no—
325Dic122—84no—
326Dic122—81no—
327Dic122—81no—
328C8×C61—24no—
329#92418—22no—
330#92418—22no—
331#61849—611nomaximal, Sylow
332C22×C61—21no—
333C22×C61—21no—
334C22×C61—24no—
335C22×C61—21no—
336C22×C61—42no—
337C22×C61—42no—
338C22×C61—84no—
339C22×C61C23×D411yescharacteristic
340C2×D61—42no—
341C2×D61—42no—
342C2×D61—42no—
343C4×C61—21no—
344C4×C61—21no—
345C4×C61—21no—
346C4×C61—21no—
347C4×C61—42no—
348C4×C61—42no—
349C4×C61—42no—
350C4×C61#57612yes—
351C4×C61C2×2−1+412yes—
352Dic61—24no—
353Dic61—24no—
354Dic61—42no—
355Dic61—42no—
356Dic61—42no—
357#3550—611no—
358#3501—611no—
359#3385—614no—
360#3384—612no—
361Q8×D8—612no—
362#3370—614no—
363#3367—612no—
364#3360—612no—
365#3243—614no—
366#3235—611no—
367#3231—611no—
368#3118—614no—
369#3110D6111yescharacteristic, complemented
370#3100—611no—
371#2985—611no—
372C2×C61—41no—
373C2×C61—44no—
374C2×C61#348611yescharacteristic
375C2×C61C2×#57611yescharacteristic
376C2×C61#358611yescharacteristic
377D61—82no—
378#563—1222no—
379#559—612no—
380Q82—612no—
381#556—612no—
382#556—1221no—
383#554—612no—
384#554—614no—
385#554—1222no—
386#554—1221no—
387D4×Q8—612no—
388D4×Q8—612no—
389D4×Q8—1221no—
390D4×Q8—1221no—
391#544—612no—
392#543—1222no—
393#542—614no—
394#542—1222no—
395#536—1222no—
396#533—611no—
397#533—611no—
398#533C2×D6111yescharacteristic
399#532—611no—
400C2×C22⋊Q8—1222no—
401#518—612no—
402C2×C4×D4C2×D6111yescharacteristic
403#501—614no—
404#501—612no—
405#500—611no—
406#500—614no—
407#498—611no—
408#490—612no—
409#489—614no—
410#488—614no—
411#487—611no—
412#487—611no—
413#485—614no—
414#484C2×D6112yes—
415#482—614no—
416#480—612no—
417#479—614no—
418#479—614no—
419#478—614no—
420#477—614no—
421#476—612no—
422#476—614no—
423#474—612no—
424#474—614no—
425#474—612no—
426#474—614no—
427#474C2×D6112yes—
428#463—614no—
429#463—614no—
430#461C2×D6112yes—
431#459—612no—
432#450C2×D6112yes—
433#447—612no—
434#446—612no—
435#446—614no—
436C8×Q8—612no—
437#442—614no—
438#440—614no—
439#440C2×D6114yes—
440C4×SD16—614no—
441C4×D8—612no—
442C4×D8—612no—
443C4×D8—614no—
444#433—614no—
445#432C2×D6111yescharacteristic
446#431—611no—
447C61#6184911yescharacteristic, complemented, Sylow
448C2×#41—1221no—
449C22×Q8—1222no—
450C22×Q8—1222no—
451C22×D4C22×D6111yescharacteristic
452C23×C4—21no—
453C2×SD16C22×D6114yes—
454C2×D8—612no—
455C2×D8—612no—
456C4⋊Q8—614no—
457C4⋊Q8—614no—
458C4⋊Q8—611no—
459C4⋊Q8—611no—
460C4⋊Q8—611no—
461C4⋊Q8—611no—
462C4⋊Q8—611no—
463C4⋊Q8—1222no—
464C4⋊Q8—1224no—
465C4⋊Q8—1222no—
466C4⋊Q8C22×D6111yescharacteristic
467C4⋊Q8C22×D6111yescharacteristic
468#127—611no—
469#126—1224no—
470#126—1224no—
471#125—21no—
472#125—614no—
473#125—612no—
474#125—612no—
475#125—1222no—
476#124—614no—
477#124—1222no—
478#124—1224no—
479#124—1221no—
480#123—1224no—
481#123—1224no—
482C22⋊Q8—21no—
483C22⋊Q8—612no—
484C22⋊Q8—612no—
485C22⋊Q8—1224no—
486C22⋊Q8—1224no—
487C22⋊Q8—1224no—
488C22⋊Q8—1224no—
489C22⋊Q8—1224no—
490C22⋊Q8—1224no—
491C22⋊Q8—1224no—
492C22⋊Q8—1222no—
493C22⋊Q8—1222no—
494C22⋊Q8—1224no—
495C22⋊Q8—1222no—
496C22⋊Q8—1222no—
497C22⋊Q8—1221no—
498C22⋊Q8—1221no—
499C22⋊Q8C22×D6112yes—
500#121—612no—
501#121—1221no—
502C4×Q8—21no—
503C4×Q8—612no—
504C4×Q8—612no—
505C4×Q8—614no—
506C4×Q8—1222no—
507C4×Q8—1221no—
508C4×Q8—1221no—
509C4×Q8C22×D6112yes—
510C4×D4—21no—
511C4×D4—21no—
512C4×D4—614no—
513C4×D4—614no—
514C4×D4—614no—
515C4×D4—612no—
516C4×D4—1222no—
517C4×D4—1222no—
518C4×D4—1222no—
519C4×D4—1221no—
520C4×D4C22×D6112yes—
521C4×D4C22×D6112yes—
522#117—21no—
523#117—612no—
524#117—612no—
525#117—1222no—
526C2×C4⋊C4—1224no—
527C2×C4⋊C4—1222no—
528C2×C4⋊C4C22×D6111yescharacteristic
529C2×C22⋊C4—21no—
530C2×C22⋊C4—1224no—
531C2×C42C22×D6111yescharacteristic
532#107—614no—
533#107—614no—
534#107—612no—
535#107—612no—
536#107C22×D6114yes—
537#106—614no—
538#106—614no—
539C4⋊C8—614no—
540C4⋊C8—614no—
541C4⋊C8—612no—
542C4⋊C8C22×D6112yes—
543#103—614no—
544#103—614no—
545#103C22×D6114yes—
546#102—612no—
547#102—612no—
548#102—614no—
549#102—614no—
550#102—612no—
551#102—612no—
552#102C22×D6114yes—
553C22⋊C8—612no—
554C22⋊C8C22×D6112yes—
555#97—614no—
556#97C22×D6112yes—
557C4×C8—614no—
558C4×C8—611no—
559C4×C8—611no—
560C24—21no—
561#41—4882no—
562C2×Q8—21no—
563C2×Q8—612no—
564C2×Q8—612no—
565C2×Q8—1224no—
566C2×Q8—1224no—
567C2×Q8—1221no—
568C2×Q8—1221no—
569C2×Q8—1221no—
570C2×Q8—4884no—
571C2×Q8—4884no—
572C2×Q8C23×D6112yes—
573C2×D4—24no—
574C2×D4—21no—
575C2×D4—612no—
576C2×D4—1222no—
577C2×D4—1221no—
578C2×D4—1221no—
579C2×D4C23×D6112yes—
580C22×C4—21no—
581C22×C4—22no—
582C22×C4—22no—
583C22×C4—82no—
584C22×C4—1224no—
585C22×C4—1224no—
586C22×C4—1224no—
587C22×C4—1222no—
588C22×C4D4×D6111yescharacteristic
589C22×C4D4×D6111yescharacteristic
590C22×C4C23×D6111yescharacteristic
591SD16—28no—
592D8—1224no—
593D8—1224no—
594C2×C8—612no—
595C2×C8—612no—
596C2×C8C23×D6114yes—
597C4⋊C4—21no—
598C4⋊C4—21no—
599C4⋊C4—21no—
600C4⋊C4—21no—
601C4⋊C4—22no—
602C4⋊C4—22no—
603C4⋊C4—614no—
604C4⋊C4—612no—
605C4⋊C4—614no—
606C4⋊C4—612no—
607C4⋊C4—612no—
608C4⋊C4—612no—
609C4⋊C4—612no—
610C4⋊C4—612no—
611C4⋊C4—612no—
612C4⋊C4—1224no—
613C4⋊C4—1224no—
614C4⋊C4—1224no—
615C4⋊C4—1224no—
616C4⋊C4—1224no—
617C4⋊C4—1222no—
618C4⋊C4—1221no—
619C4⋊C4—1222no—
620C4⋊C4—1221no—
621C4⋊C4—1221no—
622C4⋊C4C23×D6112yes—
623C4⋊C4C23×D6112yes—
624C22⋊C4—22no—
625C22⋊C4—22no—
626C22⋊C4—22no—
627C22⋊C4—614no—
628C22⋊C4—1224no—
629C22⋊C4—1224no—
630C22⋊C4—1224no—
631C22⋊C4—1224no—
632C22⋊C4—1224no—
633C22⋊C4—1222no—
634C22⋊C4—1222no—
635C22⋊C4—1222no—
636C42—22no—
637C42—614no—
638C42—1224no—
639C42—1222no—
640C42D4×D6111yescharacteristic
641C42D4×D6111yescharacteristic
642C42C23×D6111yescharacteristic
643C42C23×D6111yescharacteristic
644C23—24no—
645C23—22no—
646C23—81no—
647C23—81no—
648C23—1222no—
649C23C2×D4×D6111yescharacteristic
650Q8—24no—
651Q8—42no—
652Q8—1224no—
653Q8—4881no—
654Q8—4881no—
655Q8—4884no—
656Q8—4884no—
657Q8—2442no—
658Q8—2442no—
659D4—24no—
660D4—22no—
661D4—1222no—
662D4—1222no—
663D4—4881no—
664D4—4882no—
665D4—2442no—
666D4#1451982414yes—
667C2×C4—22no—
668C2×C4—22no—
669C2×C4—22no—
670C2×C4—22no—
671C2×C4—22no—
672C2×C4—41no—
673C2×C4—44no—
674C2×C4—82no—
675C2×C4—81no—
676C2×C4—614no—
677C2×C4—614no—
678C2×C4—1222no—
679C2×C4—1222no—
680C2×C4—1222no—
681C2×C4—4884no—
682C2×C4—4884no—
683C2×C4—4884no—
684C2×C4—2444no—
685C2×C4C2×D4×D6111yescharacteristic
686C2×C4C2×D4×D6111yescharacteristic
687C2×C4C2×D4×D6111yescharacteristic
688C2×C4C2×D4×D6111yescharacteristic
689C2×C4C2×D4×D6111yescharacteristic
690C2×C4C24×D6111yescharacteristic
691C8—24no—
692C8—1222no—
693C8—1222no—
694C22—21no—
695C22—24no—
696C22—21no—
697C22—21no—
698C22—42no—
699C22—42no—
700C22—84no—
701C22—2442no—
702C22—2442no—
703C22—2442no—
704C22C22×D4×D6111yescharacteristic
705C4—21no—
706C4—21no—
707C4—21no—
708C4—21no—
709C4—42no—
710C4—42no—
711C4—42no—
712C4—1224no—
713C4—1224no—
714C4—2442no—
715C4—2442no—
716C4—2442no—
717C4#1684056612yes—
718C4C2×#1451982412yes—
719C2—41no—
720C2—44no—
721C2—4882no—
722C2#2145946611yescharacteristic
723C2C2×#1684056611yescharacteristic
724C2#2146060211yescharacteristic
subgroupG/H
centerC22C22×D4×D61
commutator, cosocleC2×C4×C61C25
FrattiniC2×C4C24×D61
FittingC61×#3110C2
socleC22×C61C23×D4
prime radical#21455819C2
hypercenter#3110D61
hypocenterC61#61849
LCSG ▷ C2×C4×C61 ▷ C2×C61 ▷ C61
UCSC1 ◁ C22 ◁ C2×C42 ◁ #3110

Complements

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

NH ≅ G/Ntype
1. #21460230C2semidirect
2. #21459622C2semidirect
3. #21458730C2semidirect
4. #21458722C2semidirect
5. #21458669C2semidirect
6. #21458573C2semidirect
7. #21458541C2semidirect
8. #21458472C2semidirect
9. #21457106C2semidirect
10. #21457019C2semidirect
11. #21456974C2semidirect
12. #21456004C2semidirect
14. #21454916C2semidirect
15. C61×#3110C2semidirect
17. #16840497C22semidirect
18. Q8×Dic122C22semidirect
19. #16840486C22semidirect
28. #16840427C22semidirect
39. #16840171C22semidirect
40. #16840170C22semidirect
41. #16840166C22semidirect
42. #16840165C22semidirect
43. #16840158C22semidirect
44. #16840127C22semidirect
45. #16840123C22semidirect
46. #16840118C22semidirect
47. #16840112C22semidirect
48. #16840112C22semidirect
52. #16840069C22semidirect
53. #16840067C22semidirect
54. #16840065C22semidirect
55. #16840055C22semidirect
56. #16840053C22semidirect
58. #16840043C22semidirect
60. #16840041C22semidirect
66. #16839890C22semidirect
67. #16839889C22semidirect
68. #16839886C22semidirect
369. #3110D61semidirect
447. C61#61849semidirect

Maximal subgroups

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

subgroupindex
#214602302
#214596222
#214587302
#214587222
#214586692
#214585732
#214585412
#214584722
#214571062
#214570192
#214569742
#214560042
#214558192
#214549162
C61×#31102
#6184961