Finite Group Databasebeta

← #7187621

Subgroups — #7187621

Order 512.

1299 conjugacy classes of subgroups.

The subgroup lattice has 771 nodes — too large to display as a diagram.

Conjugacy classes of subgroups

#subgroupG/Hclass sizemultiplicitynormal?properties
1#59672C211yesmaximal, characteristic, complemented
2#39497C211yesmaximal, characteristic
3#32505C212yesmaximal, complemented
4#32368C212yesmaximal
5#32151C212yesmaximal, complemented
6#30975C212yesmaximal
7#29206C211yesmaximal, characteristic, complemented
8#28965C212yesmaximal
9#28836C211yesmaximal, characteristic, complemented
10#28822C212yesmaximal, complemented
11#28811C211yesmaximal, characteristic, complemented
12#28694C211yesmaximal, characteristic, complemented
13#26886C212yesmaximal, complemented
14#26511C211yesmaximal, characteristic, complemented
15#26441C211yesmaximal, characteristic, complemented
16#26090C211yesmaximal, characteristic
17#26045C211yesmaximal, characteristic
18#25458C212yesmaximal
19#23778C211yesmaximal, characteristic
20#23254C211yesmaximal, characteristic, complemented
21#23067C211yesmaximal, characteristic
22#22963C211yesmaximal, characteristic
23#22117C211yesmaximal, characteristic
24C2×#501C2212yes—
25C2×#499C2212yes—
26C2×#478C2212yes—
27C2×#476C2211yescharacteristic
28#2868C2211yescharacteristic
29#2809—22no—
30#2790—22no—
31#2729—22no—
32#2629—21no—
33#2571C2211yescharacteristic
34#2566C2212yes—
35#2565—22no—
36#2552—21no—
37#2552C2211yescharacteristic
38#2552C2211yescharacteristic
39#2552C2212yes—
40#2552C2211yescharacteristic
41#2550C2212yes—
42#2508—21no—
43#2508C2212yes—
44#2507C2212yes—
45#2506—21no—
46#2506C2212yes—
47#2452C2212yes—
48#2440—21no—
49#2439—21no—
50#2370—21no—
51#2370C2212yes—
52#2369C2211yescharacteristic
53#2369C2211yescharacteristic
54#2354C2211yescharacteristic
55D4×C4⋊C4C2211yescharacteristic
56#2317—21no—
57C4×C4⋊Q8C2211yescharacteristic
58C4×#125C2211yescharacteristic
59C4×#125C2211yescharacteristic
60#2293C2211yescharacteristic
61#2101C2212yes—
62#2101C2211yescharacteristic
63#2094C2212yes—
64#2092C2211yescharacteristic
65#2088C2212yes—
66#2088C2212yes—
67#2088C2212yes—
68#2088C2211yescharacteristic
69#2087C2211yescharacteristic
70#2085C2212yes—
71#2084C2212yes—
72#2084C2212yes—
73#2083C2212yes—
74#2067C2211yescharacteristic
75#2065C2212yes—
76#2065C2211yescharacteristic
77#2059C2212yes—
78#2059C2212yes—
79#2059C2212yes—
80#2059C2212yes—
81#2059C2211yescharacteristic
82#2058C2212yes—
83#2058C2212yes—
84#2025C2211yescharacteristic
85#1993C2212yes—
86#1990C2211yescharacteristic
87#1990C2211yescharacteristic
88#1989C2212yes—
89#1987C2211yescharacteristic
90#1949C2212yes—
91#1948C2212yes—
92#1948C2211yescharacteristic
93#1948C2211yescharacteristic
94#1948C2212yes—
95#1948C2212yes—
96#1947C2211yescharacteristic
97#1947C2211yescharacteristic
98#1947C2211yescharacteristic
99#1944C2212yes—
100#1944C2212yes—
101#1941C2212yes—
102#1941C2212yes—
103#1939C2211yescharacteristic
104#1939C2212yes—
105#1939C2211yescharacteristic
106#1936C2212yes—
107#1936C2212yes—
108#1925C2212yes—
109#1925C2212yes—
110#1920C2212yes—
111#1920C2212yes—
112#1919C2212yes—
113#1919C2212yes—
114#1918C2212yes—
115#1918C2212yes—
116#1917C2212yes—
117#1917C2212yes—
118#1864C2212yes—
119#1864C2212yes—
120#1847C2212yes—
121#1844C2211yescharacteristic
122#1844C2211yescharacteristic
123#1802C2211yescharacteristic
124#1776C2212yes—
125C4×#107C2211yescharacteristic
126C4×#106C2211yescharacteristic
127#1771C2212yes—
128#1770C2211yescharacteristic
129C8×C4⋊C4C2211yescharacteristic
130#1767C2211yescharacteristic
131C4×C4⋊C8C2211yescharacteristic
132C4×#102C2211yescharacteristic
133C4×#102C2212yes—
134C4×#102C2211yescharacteristic
135C2×C4⋊Q8—21no—
136C2×C4⋊Q8—21no—
137C2×C4⋊Q8C2311yescharacteristic
138C2×C4⋊Q8C2312yes—
139C2×#125—21no—
140C2×#125—22no—
141C2×#125D411yescharacteristic
142C2×#125C2312yes—
143C2×#125C2311yescharacteristic
144C2×#125C2312yes—
145C2×C22⋊Q8—22no—
146C2×C4×Q8—21no—
147C2×C4×D4C2311yescharacteristic
148C2×C4×D4C2312yes—
149C2×#117—21no—
150C2×#117—21no—
151C22×C4⋊C4—21no—
152#501—44no—
153#499—44no—
154#478—44no—
155#476Q818yescomplemented
156C2×#107C2312yes—
157C2×#107C2312yes—
158C2×#107C2311yescharacteristic
159C2×#107C2311yescharacteristic
160C2×#107C2312yes—
161C2×#106C2311yescharacteristic
162C2×#106C2311yescharacteristic
163C2×#106C2312yes—
164C2×#106C2312yes—
165C2×#106C2312yes—
166C2×#106C2312yes—
167C2×#106C2312yes—
168C2×#106C2312yes—
169C2×#106C2312yes—
170C2×C4⋊C8C2311yescharacteristic
171C2×C4⋊C8C2311yescharacteristic
172C2×C4⋊C8C2312yes—
173C2×C4⋊C8C2311yescharacteristic
174C2×C4⋊C8C2312yes—
175C2×C4⋊C8C2311yescharacteristic
176C2×#102C2311yescharacteristic
177C2×#102C2311yescharacteristic
178C2×#102C2311yescharacteristic
179C2×#102C2312yes—
180C2×#102C2311yescharacteristic
181C2×#102C2312yes—
182C2×#97C2312yes—
183C2×#97C2312yes—
184C2×C4×C8C2311yescharacteristic
185C2×C4×C8C2311yescharacteristic
186C2×C4×C8C2312yes—
187#400—22no—
188#400—22no—
189#400—22no—
190#398—22no—
191#398—22no—
192#398—22no—
193#398—22no—
194#398—22no—
195#398—22no—
196#398—22no—
197#398—22no—
198#398—22no—
199#398—22no—
200#396—22no—
201#396—22no—
202#396—22no—
203#395—22no—
204#393—22no—
205#391—21no—
206#391—22no—
207#391—22no—
208#391—22no—
209#390C2311yescharacteristic
210#390C2312yes—
211#390C2311yescharacteristic
212#389—21no—
213#389—21no—
214#389—21no—
215#389—21no—
216#389—22no—
217#389—22no—
218#389—21no—
219#389—21no—
220#389—21no—
221#389—22no—
222#389—22no—
223#389D411yescharacteristic
224#389D411yescharacteristic
225#389C2311yescharacteristic
226#389C2311yescharacteristic
227#389C2312yes—
228#389C2312yes—
229#389C2312yes—
230#389C2312yes—
231#389C2312yes—
232#389C2311yescharacteristic
233#389C2312yes—
234#389C2312yes—
235#389C2311yescharacteristic
236#389C2312yes—
237#388—21no—
238#388—21no—
239#388—22no—
240#387—22no—
241#387—22no—
242#387—22no—
243#387—21no—
244#387—21no—
245#387—22no—
246#387—22no—
247#387D412yes—
248#387D412yes—
249#385—22no—
250#385—22no—
251#385—22no—
252#385—22no—
253#384—22no—
254#384—21no—
255#384—21no—
256#384—21no—
257#384—21no—
258#384C2311yescharacteristic
259#384C2312yes—
260#384C2311yescharacteristic
261#384C2312yes—
262#384C2311yescharacteristic
263#382—21no—
264#382—22no—
265#382D411yescharacteristic
266#382C2311yescharacteristic
267#382C2312yes—
268#380—21no—
269#380—21no—
270C4×C4⋊C4—21no—
271C4×C4⋊C4—21no—
272C4×C4⋊C4—21no—
273C4×C4⋊C4—21no—
274C4×C4⋊C4—21no—
275C4×C4⋊C4—22no—
276C4×C4⋊C4C2311yescharacteristic
277C4×C4⋊C4C2311yescharacteristic
278C4×C4⋊C4C2312yes—
279C4×C4⋊C4C2311yescharacteristic
280C4×C4⋊C4C2312yes—
281C4×C4⋊C4C2312yes—
282C4×C4⋊C4C2312yes—
283C4×C4⋊C4C2312yes—
284C4×C4⋊C4C2311yescharacteristic
285C4×C4⋊C4C2311yescharacteristic
286C4×C4⋊C4C2312yes—
287C4×C22⋊C4—21no—
288C43C2311yescharacteristic
289#340C2312yes—
290#340C2312yes—
291#340C2312yes—
292#340C2312yes—
293#340C2312yes—
294#340C2311yescharacteristic
295#340C2311yescharacteristic
296#340C2311yescharacteristic
297#340C2312yes—
298#340C2312yes—
299#340C2311yescharacteristic
300#340C2312yes—
301#340C2312yes—
302#340C2311yescharacteristic
303#340C2312yes—
304#340C2311yescharacteristic
305#340C2312yes—
306#340C2311yescharacteristic
307#340C2311yescharacteristic
308#340C2312yes—
309#336C2311yescharacteristic
310#336C2311yescharacteristic
311#336C2312yes—
312#336C2312yes—
313#336C2312yes—
314#336C2312yes—
315#336C2312yes—
316C22×Q8—21no—
317C22×Q8—22no—
318C22×D4C2411yescharacteristic
319C23×C4—21no—
320C23×C4—22no—
321C22×C8C2411yescharacteristic
322C22×C8C2411yescharacteristic
323C22×C8C2412yes—
324C22×C8C2412yes—
325C22×C8C2411yescharacteristic
326C22×C8C2411yescharacteristic
327C4⋊Q8—22no—
328C4⋊Q8—42no—
329C4⋊Q8—42no—
330C4⋊Q8—82no—
331C4⋊Q8—82no—
332C4⋊Q8C2×Q814yes—
333#125—24no—
334#125—22no—
335#125—42no—
336#125—42no—
337#125—41no—
338#125—42no—
339#125—42no—
340#125—44no—
341#125—84no—
342C22⋊Q8—84no—
343C4×Q8—82no—
344C4×D4—22no—
345C4×D4—42no—
346C4×D4—42no—
347C4×D4C2×Q814yes—
348#117—44no—
349#117—82no—
350C2×C4⋊C4—21no—
351C2×C4⋊C4—21no—
352C2×C4⋊C4—21no—
353C2×C4⋊C4—21no—
354C2×C4⋊C4—21no—
355C2×C4⋊C4—21no—
356C2×C4⋊C4—21no—
357C2×C4⋊C4—22no—
358C2×C4⋊C4—22no—
359C2×C4⋊C4—21no—
360C2×C4⋊C4—21no—
361C2×C4⋊C4—22no—
362C2×C4⋊C4—22no—
363C2×C4⋊C4—22no—
364C2×C4⋊C4—22no—
365C2×C4⋊C4—21no—
366C2×C4⋊C4—22no—
367C2×C4⋊C4—22no—
368C2×C4⋊C4—22no—
369C2×C4⋊C4—22no—
370C2×C4⋊C4—22no—
371C2×C4⋊C4—22no—
372C2×C4⋊C4—22no—
373C2×C4⋊C4—22no—
374C2×C4⋊C4—21no—
375C2×C4⋊C4—22no—
376C2×C4⋊C4—22no—
377C2×C4⋊C4—21no—
378C2×C4⋊C4—22no—
379C2×C4⋊C4—21no—
380C2×C4⋊C4—82no—
381C2×C4⋊C4C2×D411yescharacteristic
382C2×C4⋊C4C2×D411yescharacteristic
383C2×C4⋊C4C2×D411yescharacteristic
384C2×C4⋊C4C2×D412yes—
385C2×C4⋊C4C2×D411yescharacteristic
386C2×C4⋊C4C2×D412yes—
387C2×C4⋊C4C2×D412yes—
388C2×C4⋊C4C2×D412yes—
389C2×C4⋊C4C2412yes—
390C2×C4⋊C4C2411yescharacteristic
391C2×C4⋊C4C2412yes—
392C2×C4⋊C4C2412yes—
393C2×C4⋊C4C2411yescharacteristic
394C2×C4⋊C4C2411yescharacteristic
395C2×C4⋊C4C2411yescharacteristic
396C2×C4⋊C4C2411yescharacteristic
397C2×C4⋊C4C2411yescharacteristic
398C2×C4⋊C4C2412yes—
399C2×C4⋊C4C2411yescharacteristic
400C2×C22⋊C4—21no—
401C2×C22⋊C4—21no—
402C2×C22⋊C4—21no—
403C2×C22⋊C4—21no—
404C2×C22⋊C4—21no—
405C2×C22⋊C4—22no—
406C2×C22⋊C4—22no—
407C2×C22⋊C4—22no—
408C2×C42—21no—
409C2×C42—22no—
410C2×C42—21no—
411C2×C42—21no—
412C2×C42—22no—
413C2×C42—22no—
414C2×C42—22no—
415C2×C42C2×D411yescharacteristic
416C2×C42C2×D411yescharacteristic
417C2×C42C2×D411yescharacteristic
418C2×C42C2×D411yescharacteristic
419C2×C42C2412yes—
420C2×C42C2411yescharacteristic
421C2×C42C2411yescharacteristic
422C2×C42C2412yes—
423C2×C42C2411yescharacteristic
424#107—22no—
425#107—24no—
426#107—24no—
427#107—41no—
428#107—42no—
429#106—22no—
430#106—22no—
431#106—42no—
432#106—42no—
433#106—42no—
434#106—42no—
435#106—42no—
436#106—42no—
437#106C2×Q818yes—
438C4⋊C8—22no—
439C4⋊C8—22no—
440C4⋊C8—24no—
441C4⋊C8—22no—
442C4⋊C8—42no—
443C4⋊C8C2×Q814yes—
444#102—22no—
445#102—22no—
446#102—22no—
447#102—41no—
448#102—42no—
449#102C2×Q818yes—
450#97—24no—
451#97—42no—
452C4×C8—22no—
453C4×C8—22no—
454C4×C8—42no—
455#95—21no—
456#95—21no—
457#95—21no—
458#95—21no—
459#95—21no—
460#95—22no—
461#95—22no—
462#95—22no—
463#95—21no—
464#95—22no—
465#95—22no—
466#95—21no—
467#95—21no—
468#95—22no—
469#95—22no—
470#95—21no—
471#95—22no—
472#95—22no—
473#95—22no—
474#95—22no—
475#95—22no—
476#95—22no—
477#95—22no—
478#95C2×D412yes—
479#95C2×D412yes—
480#95C2×D412yes—
481#95C2×D412yes—
482#95C2×D412yes—
483#95C2×D412yes—
484C24—21no—
485C2×Q8—24no—
486C2×Q8—44no—
487C2×Q8—81no—
488C2×Q8—81no—
489C2×Q8—82no—
490C2×Q8—82no—
491C2×D4—21no—
492C2×D4—21no—
493C2×D4—21no—
494C2×D4—21no—
495C2×D4—21no—
496C2×D4C22×Q812yes—
497C22×C4—22no—
498C22×C4—21no—
499C22×C4—21no—
500C22×C4—24no—
501C22×C4—21no—
502C22×C4—21no—
503C22×C4—21no—
504C22×C4—21no—
505C22×C4—21no—
506C22×C4—22no—
507C22×C4—22no—
508C22×C4—22no—
509C22×C4—42no—
510C22×C4—42no—
511C22×C4—82no—
512C22×C4—82no—
513C22×C4—82no—
514C22×C4C22×D412yes—
515C22×C4C22×D411yescharacteristic
516C22×C4C22×D412yes—
517C22×C4C22×D411yescharacteristic
518C22×C4C22×D412yes—
519C22×C4C22×D412yes—
520C22×C4C22×D411yescharacteristic
521C22×C4C22×D411yescharacteristic
522C22×C4C22×D411yescharacteristic
523C22×C4C22×D411yescharacteristic
524C22×C4C2511yescharacteristic
525C2×C8—21no—
526C2×C8—22no—
527C2×C8—21no—
528C2×C8—21no—
529C2×C8—22no—
530C2×C8—21no—
531C2×C8—22no—
532C2×C8—21no—
533C2×C8—21no—
534C2×C8—21no—
535C2×C8—21no—
536C2×C8—22no—
537C2×C8—22no—
538C2×C8—21no—
539C2×C8—21no—
540C2×C8C22×Q814yes—
541C2×C82−1+412yes—
542C2×C82−1+412yes—
543C4⋊C4—24no—
544C4⋊C4—22no—
545C4⋊C4—22no—
546C4⋊C4—22no—
547C4⋊C4—22no—
548C4⋊C4—24no—
549C4⋊C4—21no—
550C4⋊C4—22no—
551C4⋊C4—21no—
552C4⋊C4—22no—
553C4⋊C4—21no—
554C4⋊C4—21no—
555C4⋊C4—22no—
556C4⋊C4—22no—
557C4⋊C4—21no—
558C4⋊C4—21no—
559C4⋊C4—21no—
560C4⋊C4—21no—
561C4⋊C4—21no—
562C4⋊C4—21no—
563C4⋊C4—21no—
564C4⋊C4—22no—
565C4⋊C4—22no—
566C4⋊C4—22no—
567C4⋊C4—21no—
568C4⋊C4—42no—
569C4⋊C4—42no—
570C4⋊C4—42no—
571C4⋊C4—44no—
572C4⋊C4—42no—
573C4⋊C4—44no—
574C4⋊C4—42no—
575C4⋊C4—42no—
576C4⋊C4—42no—
577C4⋊C4—44no—
578C4⋊C4—44no—
579C4⋊C4—42no—
580C4⋊C4—42no—
581C4⋊C4—42no—
582C4⋊C4—42no—
583C4⋊C4—81no—
584C4⋊C4—82no—
585C4⋊C4—81no—
586C4⋊C4—82no—
587C4⋊C4—82no—
588C4⋊C4—82no—
589C4⋊C4—82no—
590C4⋊C4—82no—
591C4⋊C4—82no—
592C4⋊C4—82no—
593C4⋊C4—82no—
594C4⋊C4—82no—
595C4⋊C4—82no—
596C4⋊C4—81no—
597C4⋊C4—81no—
598C4⋊C4—82no—
599C4⋊C4—82no—
600C4⋊C4C22×Q814yes—
601C4⋊C4C22×Q812yes—
602C4⋊C4H(5,𝔽2)12yes—
603C22⋊C4—24no—
604C22⋊C4—42no—
605C22⋊C4—42no—
606C22⋊C4—42no—
607C22⋊C4—42no—
608C22⋊C4—82no—
609C22⋊C4—82no—
610C22⋊C4—82no—
611C42—22no—
612C42—22no—
613C42—22no—
614C42—22no—
615C42—21no—
616C42—22no—
617C42—21no—
618C42—21no—
619C42—22no—
620C42—22no—
621C42—21no—
622C42—41no—
623C42—42no—
624C42—42no—
625C42—42no—
626C42—44no—
627C42—82no—
628C42—82no—
629C42—82no—
630C42C22×Q812yes—
631C422−1+412yes—
632C23—22no—
633C23—41no—
634C23—41no—
635C23—41no—
636C23—41no—
637C23—41no—
638C23—41no—
639C23C23×D411yescharacteristic
640Q8—84no—
641Q8—164no—
642D4—22no—
643D4—22no—
644D4—41no—
645D4—41no—
646C2×C4—21no—
647C2×C4—21no—
648C2×C4—21no—
649C2×C4—21no—
650C2×C4—21no—
651C2×C4—21no—
652C2×C4—22no—
653C2×C4—22no—
654C2×C4—22no—
655C2×C4—24no—
656C2×C4—22no—
657C2×C4—21no—
658C2×C4—22no—
659C2×C4—21no—
660C2×C4—22no—
661C2×C4—22no—
662C2×C4—22no—
663C2×C4—21no—
664C2×C4—21no—
665C2×C4—21no—
666C2×C4—22no—
667C2×C4—22no—
668C2×C4—21no—
669C2×C4—21no—
670C2×C4—22no—
671C2×C4—22no—
672C2×C4—22no—
673C2×C4—22no—
674C2×C4—41no—
675C2×C4—42no—
676C2×C4—41no—
677C2×C4—42no—
678C2×C4—41no—
679C2×C4—41no—
680C2×C4—48no—
681C2×C4—41no—
682C2×C4—41no—
683C2×C4—42no—
684C2×C4—42no—
685C2×C4—42no—
686C2×C4—42no—
687C2×C4—41no—
688C2×C4—41no—
689C2×C4—42no—
690C2×C4—41no—
691C2×C4—41no—
692C2×C4—41no—
693C2×C4—41no—
694C2×C4—41no—
695C2×C4—41no—
696C2×C4—41no—
697C2×C4—42no—
698C2×C4—42no—
699C2×C4—41no—
700C2×C4—42no—
701C2×C4—41no—
702C2×C4—41no—
703C2×C4—41no—
704C2×C4—42no—
705C2×C4—164no—
706C2×C4D4×Q812yes—
707C2×C4D4×Q812yes—
708C2×C4#57512yes—
709C2×C4#57712yes—
710C2×C4#57712yes—
711C2×C4C23×Q811yescharacteristic
712C2×C4C2×H(5,𝔽2)11yescharacteristic
713C2×C4C2×2−1+411yescharacteristic
714C2×C4C2×2−1+411yescharacteristic
715C2×C4C2×2−1+411yescharacteristic
716C2×C4#58511yescharacteristic
717C8—24no—
718C8—22no—
719C8—22no—
720C8—42no—
721C8—41no—
722C8—41no—
723C22—42no—
724C22—42no—
725C22—42no—
726C22—81no—
727C22—81no—
728C22—81no—
729C22—81no—
730C22C2×D4×Q811yescharacteristic
731C22#348811yescharacteristic
732C22#349911yescharacteristic
733C22C2×#57511yescharacteristic
734C22C2×#57711yescharacteristic
735C22C2×#57711yescharacteristic
736C22#358511yescharacteristic
737C4—22no—
738C4—22no—
739C4—42no—
740C4—42no—
741C4—41no—
742C4—41no—
743C4—42no—
744C4—42no—
745C4—41no—
746C4—42no—
747C4—42no—
748C4—44no—
749C4—81no—
750C4—81no—
751C4—82no—
752C4—81no—
753C4—81no—
754C4—81no—
755C4—82no—
756C4—82no—
757C4#338814yes—
758C4#350211yescharacteristic
759C4#350311yescharacteristic
760C4#355211yescharacteristic
761C4#356311yescharacteristic
762C2—82no—
763C2#4527211yescharacteristic
764C2C2×#338811yescharacteristic
765C2#6138211yescharacteristic
766C2#6198711yescharacteristic
767C2#6203311yescharacteristic
768C2#6248611yescharacteristic
769C2#6251211yescharacteristic
subgroupG/H
center, socleC23C23×D4
commutator, Frattini, cosocleC22×C4C25
prime radicalC22×D4C24
LCSG ▷ C22×C4 ▷ C2 ▷ C1
UCSC1 ◁ C23 ◁ C4×#125 ◁ G
LECSG ▷ C22×C4 ▷ C2 ▷ C1

Complements

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

NH ≅ G/Ntype
1. #59672C2semidirect
3. #32505C2semidirect
5. #32151C2semidirect
7. #29206C2semidirect
9. #28836C2semidirect
10. #28822C2semidirect
11. #28811C2semidirect
12. #28694C2semidirect
13. #26886C2semidirect
14. #26511C2semidirect
15. #26441C2semidirect
20. #23254C2semidirect
155. #476Q8semidirect

Maximal subgroups

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

subgroupindex
#596722
#394972
#325052
#323682
#321512
#309752
#292062
#289652
#288362
#288222
#288112
#286942
#268862
#265112
#264412
#260902
#260452
#254582
#237782
#232542
#230672
#229632
#221172