Finite Group Databasebeta

← C2×#22619611 #33953219

Subgroups — C2×#22619611 #33953219

Order 18688.

2934 conjugacy classes of subgroups.

The subgroup lattice has 666 nodes — too large to display as a diagram.

Conjugacy classes of subgroups

#subgroupG/Hclass sizemultiplicitynormal?properties
1C22×#14556619C211yesmaximal, characteristic, complemented
2C2×#17989165C211yesmaximal, characteristic, complemented
3C2×#17989151C211yesmaximal, characteristic, complemented
4#22619611C2116yesmaximal, direct product factor
5C2×#17988840C212yesmaximal, complemented
6C2×#17988833C212yesmaximal, complemented
7C2×#17988823C212yesmaximal, complemented
8C2×#17988816C212yesmaximal, complemented
9C2×#17988629C211yesmaximal, characteristic, complemented
10C2×#17988584C211yesmaximal, characteristic, complemented
11C22×#14556513C211yesmaximal, characteristic, complemented
12C22×#131×C73C211yesmaximal, characteristic, complemented
13C22×#11924028C2211yescharacteristic
14C23×D292C2211yescharacteristic
15C2×#14556619—28no—
16C2×#14556619C2218yescomplemented
17C22×#11924017C2212yes—
18C22×D584C2212yes—
19#17989165—24no—
20#17989165C2218yescomplemented
21#17989151—24no—
22#17989151C2218yescomplemented
23C2×#14556587—21no—
24C2×#14556580—21no—
25C2×#14556570C2212yescomplemented
26C2×#14556567—21no—
27C2×#14556565C2212yes—
28C2×#14556565C2212yes—
29C2×#14556565C2212yescomplemented
30C2×#14556563—22no—
31C2×#14556562—21no—
32C2×#14556559—22no—
33C2×#14556550C2211yescharacteristic
34C22×C4⋊Dic73C2211yescharacteristic
35#17988840C22116yescomplemented
36#17988833C22116yescomplemented
37#17988823C22116yescomplemented
38#17988816C22116yescomplemented
39#17988629C2218yescomplemented
40C2×#14556525C2212yescomplemented
41C2×#14556523C2212yescomplemented
42#17988584C2218yescomplemented
43C2×#14556516C2211yescharacteristic, complemented
44C2×#14556516C2211yescharacteristic, complemented
45C2×#14556513C2212yes—
46C2×#14556513C2212yes—
47C2×#14556513C2218yescomplemented
48C2×#14556513C2211yescharacteristic, complemented
49C2×#14556513C2211yescharacteristic, complemented
50C22×#41×C73C2211yescharacteristic
51C2×#131×C73—28no—
52C2×#131×C73C2218yescomplemented
53C22×M16×C73C2211yescharacteristic
54C22×M16×C73C2212yescomplemented
55C23×C8×C73C2211yescharacteristic
56C23×C8×C73C2212yescomplemented
57C24×D73—21no—
58C2×#11924028—22no—
59C2×#11924028—24no—
60C2×#11924028—24no—
61C2×#11924028C2314yes—
62C22×Dic146C2311yescharacteristic
63C22×D292—24no—
64C22×D292—21no—
65C22×D292—22no—
66C22×D292—24no—
67C22×D292C2314yes—
68C22×D292C2312yes—
69C22×D292C2311yescharacteristic
70C22×C22⋊D73—21no—
71C22×C22⋊D73—22no—
72C22×C22⋊D73—22no—
73C22×C22⋊D73—22no—
74C23×Dic73—21no—
75C22×C4×D73—21no—
76#14556619—232no—
77C2×#11924017—28no—
78C2×#11924017C2318yes—
79C2×D584—28no—
80C2×D584C2318yes—
81#14556587—28no—
82#14556580—28no—
83#14556570—24no—
84#14556570C2318yescomplemented
85#14556567—28no—
86#14556565—24no—
87#14556565—24no—
88#14556565—24no—
89#14556565C2318yes—
90#14556565C2318yes—
91#14556565C2318yescomplemented
92#14556563—216no—
93#14556562—28no—
94#14556559—216no—
95#14556550—22no—
96#14556550C2314yes—
97C2×C4⋊Dic73—22no—
98C2×C4⋊Dic73—21no—
99C2×C4⋊Dic73C2311yescharacteristic
100C2×C4⋊Dic73C2312yes—
101C2×C4⋊Dic73C2311yescharacteristic
102C2×C4⋊Dic73C2314yes—
103C2×#11924007—22no—
104C2×C22⋊Dic73—21no—
105C2×C22⋊Dic73—22no—
106C2×#11924005—22no—
107C2×#11924005—22no—
108C2×#11924005—22no—
109C2×C4×Dic73—21no—
110#14556525C2318yescomplemented
111#14556523C2318yescomplemented
112#14556516C2314yescomplemented
113#14556516C2314yescomplemented
114#14556513C2318yes—
115#14556513C2318yes—
116#14556513C2314yescomplemented
117#14556513C2314yescomplemented
118C2×#41×C73—24no—
119C2×#41×C73—24no—
120C2×#41×C73D414yes—
121C2×#41×C73C2314yes—
122C22×Q8×C73D411yescharacteristic
123C22×D4×C73D411yescharacteristic
124C22×D4×C73D412yes—
125C23×C4×C73C2312yes—
126C23×C4×C73C2311yescharacteristic
127#131×C73—232no—
128C2×M16×C73—28no—
129C2×M16×C73D418yescomplemented
130C2×M16×C73C2314yes—
131C2×M16×C73C2318yescomplemented
132C22×C8×C73—24no—
133C22×C8×C73—28no—
134C22×C8×C73C2311yescharacteristic
135C22×C8×C73C2311yescharacteristic
136C22×C8×C73C2314yes—
137C22×C8×C73C2312yes—
138C22×C8×C73C2318yescomplemented
139C23×D73—21no—
140C23×D73—22no—
141C23×D73—24no—
142C23×D73—44no—
143C23×D73—82no—
144C23×D73—82no—
145#11924028—28no—
146#11924028—28no—
147#11924028—48no—
148C2×Dic146—22no—
149C2×Dic146—22no—
150C2×Dic146—21no—
151C2×Dic146C2412yes—
152C2×D292—22no—
153C2×D292—24no—
154C2×D292—28no—
155C2×D292—24no—
156C2×D292—28no—
157C2×D292—22no—
158C2×D292—22no—
159C2×D292—21no—
160C2×D292—24no—
161C2×D292—44no—
162C2×D292—48no—
163C2×D292C2414yes—
164C2×D292C2412yes—
165C2×C22⋊D73—24no—
166C2×C22⋊D73—28no—
167C2×C22⋊D73—28no—
168C2×C22⋊D73—28no—
169C2×C22⋊D73—44no—
170C2×C22⋊D73—84no—
171C2×C22⋊D73—84no—
172C2×C22⋊D73—84no—
173C22×Dic73—21no—
174C22×Dic73—21no—
175C22×Dic73—22no—
176C22×Dic73—21no—
177C22×Dic73—24no—
178C22×Dic73—82no—
179C2×C4×D73—24no—
180C2×C4×D73—44no—
181#11924017—216no—
182D584—216no—
183C4⋊Dic73—24no—
184C4⋊Dic73—22no—
185C4⋊Dic73—21no—
186C4⋊Dic73—21no—
187C4⋊Dic73C2414yes—
188C4⋊Dic73C2412yes—
189C4⋊Dic73C2412yes—
190#11924007—28no—
191C22⋊Dic73—24no—
192C22⋊Dic73—28no—
193#11924005—28no—
194#11924005—28no—
195#11924005—28no—
196C4×Dic73—24no—
197C24×C73C2×D412yes—
198C24×C73C2×D411yescharacteristic
199#41×C73—216no—
200#41×C73—28no—
201#41×C73—28no—
202C2×Q8×C73—24no—
203C2×Q8×C73C2×D414yes—
204C2×D4×C73—28no—
205C2×D4×C73—24no—
206C2×D4×C73C2×D418yes—
207C2×D4×C73C2×D414yes—
208C22×C4×C73—24no—
209C22×C4×C73—24no—
210C22×C4×C73C2×D414yes—
211C22×C4×C73C2×D412yes—
212C22×C4×C73C2×D414yes—
213C22×C4×C73C2×D411yescharacteristic
214C22×C4×C73C2×D412yes—
215C22×C4×C73#4114yes—
216C22×C4×C73C2414yes—
217C22×C4×C73C2411yescharacteristic
218C22×C4×C73C2412yes—
219M16×C73—216no—
220M16×C73C2×D4116yescomplemented
221C2×C8×C73—22no—
222C2×C8×C73—22no—
223C2×C8×C73—28no—
224C2×C8×C73—216no—
225C2×C8×C73C2×D418yes—
226C2×C8×C73C2412yes—
227C2×C8×C73C2412yes—
228C2×C8×C73C2414yes—
229C23×C73—22no—
230C23×C73—22no—
231C23×C73—24no—
232C23×C73—24no—
233C23×C73—24no—
234C23×C73#12114yes—
235C23×C73C22×D414yes—
236C23×C73C22×D412yes—
237C23×C73C22×D411yescharacteristic
238C22×D73—22no—
239C22×D73—24no—
240C22×D73—42no—
241C22×D73—48no—
242C22×D73—44no—
243C22×D73—42no—
244C22×D73—44no—
245C22×D73—44no—
246C22×D73—42no—
247C22×D73—84no—
248C22×D73—84no—
249C22×D73—816no—
250Q8×C73—28no—
251D4×C73—216no—
252D4×C73—28no—
253C2×C4×C73—24no—
254C2×C4×C73—28no—
255C2×C4×C73—24no—
256C2×C4×C73—24no—
257C2×C4×C73#12114yes—
258C2×C4×C73#12118yes—
259C2×C4×C73C22×D412yes—
260C2×C4×C73C22×D414yes—
261C2×C4×C73C22×D414yes—
262C2×C4×C73C22×D411yescharacteristic
263C2×C4×C73C22×D412yes—
264C2×C4×C73C2×#4112yes—
265C2×C4×C73C2×#4114yes—
266C2×C4×C73C2511yescharacteristic
267C22⋊D73—48no—
268C22⋊D73—88no—
269C22⋊D73—88no—
270C22⋊D73—88no—
271C2×Dic73—22no—
272C2×Dic73—22no—
273C2×Dic73—24no—
274C2×Dic73—22no—
275C2×Dic73—42no—
276C2×Dic73—44no—
277C2×Dic73—42no—
278C2×Dic73—42no—
279C2×Dic73—84no—
280D292—22no—
281D292—24no—
282D292—24no—
283D292—22no—
284D292—44no—
285D292—48no—
286D292—42no—
287C4×D73—48no—
288Dic146—22no—
289Dic146—22no—
290Dic146—42no—
291C8×C73—22no—
292C8×C73—22no—
293C8×C73C22×D418yes—
294C22×C73—28no—
295C22×C73—22no—
296C22×C73—22no—
297C22×C73—24no—
298C22×C73—24no—
299C22×C73—24no—
300C22×C73—48no—
301C22×C73C2×#12114yes—
302C22×C73C2×#12112yes—
303C22×C73#57612yes—
304C22×C73#57712yes—
305C22×C73C23×D411yescharacteristic
306C2×D73—42no—
307C2×D73—44no—
308C2×D73—42no—
309C2×D73—44no—
310C2×D73—44no—
311C2×D73—42no—
312C2×D73—816no—
313C2×D73—84no—
314C2×D73—88no—
315C4×C73—24no—
316C4×C73C2×#12112yes—
317C4×C73C2×#12114yes—
318C4×C73C23×D411yescharacteristic
319C4×C73C22×#4111yescharacteristic
320Dic73—42no—
321Dic73—44no—
322Dic73—42no—
323Dic73—42no—
324C2×#3062—731nomaximal, Sylow
325C2×C73—24no—
326C2×C73—44no—
327C2×C73#306214yescomplemented
328C2×C73C22×#12111yescharacteristic
329C2×C73C2×#57611yescharacteristic
330C2×C73C2×#57711yescharacteristic
331D73—82no—
332D73—84no—
333C22×AGL(1,ℤ/8)—731no—
334C22×#131D7311yescharacteristic, complemented
335C2×#537—731no—
336C2×#535—731no—
337#3062—7316no—
338C2×#469—732no—
339C2×#468—732no—
340C2×#466—732no—
341C2×#465—732no—
342C2×#428—731no—
343C2×#416—731no—
344C22×#102—731no—
345C73C2×#306211yescharacteristic, complemented, Sylow
346C22×#41—731no—
347C22×#41C2×D7311yescharacteristic
348C23×D4—731no—
349C2×AGL(1,ℤ/8)—738no—
350C2×AGL(1,ℤ/8)—1468no—
351C22×SD16—732no—
352C22×D8—732no—
353C2×#131—28no—
354C2×#131C2×D7318yescomplemented
355C22×M16C2×D7311yescharacteristic
356C22×M16C2×D7312yescomplemented
357C23×C8C2×D7311yescharacteristic
358C23×C8C2×D7312yescomplemented
359#537—738no—
360#537—1464no—
361#535—738no—
362#535—1464no—
363C2×#127—1461no—
364C2×#124—1461no—
365C2×C22⋊Q8—732no—
366C2×C22⋊Q8—1461no—
367C2×#121—732no—
368C2×#121—732no—
369C2×#121—732no—
370C2×#121—1461no—
371C2×#121—1462no—
372C2×#120—1462no—
373C2×#117—731no—
374C22×C4⋊C4—731no—
375#469—7316no—
376#468—7316no—
377#466—7316no—
378#465—7316no—
379#428—738no—
380C2×#107—732no—
381C2×#106—732no—
382#416—738no—
383C2×#103—731no—
384C2×#103—731no—
385C2×#102—732no—
386C2×#102—732no—
387C2×#102—738no—
388C2×#102—731no—
389C2×#102—731no—
390C25—1461no—
391C2×#41—24no—
392C2×#41—24no—
393C2×#41—734no—
394C2×#41—1464no—
395C2×#41—1464no—
396C2×#41—1462no—
397C2×#41D29214yes—
398C2×#41C22×D7314yes—
399C22×Q8—731no—
400C22×Q8D29211yescharacteristic
401C22×D4—731no—
402C22×D4—732no—
403C22×D4—734no—
404C22×D4—1461no—
405C22×D4—1462no—
406C22×D4—1462no—
407C22×D4—1462no—
408C22×D4—1464no—
409C22×D4—1461no—
410C22×D4—1462no—
411C22×D4—1464no—
412C22×D4D29212yes—
413C22×D4D29211yescharacteristic
414C23×C4—1461no—
415C23×C4—1461no—
416C23×C4C22×D7312yes—
417C23×C4C22×D7311yescharacteristic
418AGL(1,ℤ/8)—14632no—
419C2×SD16—738no—
420C2×SD16—1468no—
421C2×D8—738no—
422C2×D8—1468no—
423#131—232no—
424C2×M16—28no—
425C2×M16C22⋊D7318yescomplemented
426C2×M16C22×D7314yes—
427C2×M16C22×D7318yescomplemented
428C22×C8—24no—
429C22×C8—28no—
430C22×C8C22×D7311yescharacteristic
431C22×C8C22×D7311yescharacteristic
432C22×C8C22×D7314yes—
433C22×C8C22×D7312yes—
434C22×C8C22×D7318yescomplemented
435#127—1468no—
436#124—1468no—
437C22⋊Q8—738no—
438C22⋊Q8—1468no—
439C22⋊Q8—1464no—
440#121—738no—
441#121—738no—
442#121—738no—
443#121—1468no—
444#121—14616no—
445#121—1464no—
446#121—1464no—
447#121—1464no—
448#120—14616no—
449#117—734no—
450#117—1462no—
451C2×C4⋊C4—732no—
452C2×C4⋊C4—734no—
453C2×C4⋊C4—731no—
454C2×C4⋊C4—731no—
455C2×C4⋊C4—1461no—
456C2×C4⋊C4—1462no—
457C2×C4⋊C4—1462no—
458C2×C22⋊C4—1461no—
459C2×C22⋊C4—1462no—
460C2×C22⋊C4—1462no—
461C2×C22⋊C4—1462no—
462C2×C22⋊C4—1462no—
463C2×C42—1461no—
464#107—738no—
465#106—738no—
466#103—734no—
467#103—734no—
468#102—738no—
469#102—738no—
470#102—734no—
471#102—734no—
472C24—2924no—
473C24—5842no—
474C24—5842no—
475C24—1461no—
476C24—1462no—
477C24—1464no—
478C24C2×D29212yes—
479C24C2×D29211yescharacteristic
480#41—216no—
481#41—28no—
482#41—28no—
483#41—2928no—
484#41—1468no—
485#41—1468no—
486C2×Q8—24no—
487C2×Q8—732no—
488C2×Q8—1462no—
489C2×Q8—1462no—
490C2×Q8—1461no—
491C2×Q8C2×D29214yes—
492C2×D4—28no—
493C2×D4—24no—
494C2×D4—2924no—
495C2×D4—2924no—
496C2×D4—2928no—
497C2×D4—5844no—
498C2×D4—5844no—
499C2×D4—5844no—
500C2×D4—732no—
501C2×D4—734no—
502C2×D4—1464no—
503C2×D4—1468no—
504C2×D4—1468no—
505C2×D4—1468no—
506C2×D4—1462no—
507C2×D4—1464no—
508C2×D4—1468no—
509C2×D4—1462no—
510C2×D4—1461no—
511C2×D4—1464no—
512C2×D4—1464no—
513C2×D4—1468no—
514C2×D4—1462no—
515C2×D4C2×D29218yes—
516C2×D4C2×D29214yes—
517C22×C4—24no—
518C22×C4—24no—
519C22×C4—2924no—
520C22×C4—5842no—
521C22×C4—1461no—
522C22×C4—1461no—
523C22×C4—1462no—
524C22×C4—1461no—
525C22×C4—1464no—
526C22×C4—1464no—
527C22×C4C2×C22⋊D7314yes—
528C22×C4C2×D29214yes—
529C22×C4C2×D29212yes—
530C22×C4C2×D29212yes—
531C22×C4C2×D29211yescharacteristic
532C22×C4#1192402814yes—
533C22×C4C23×D7314yes—
534C22×C4C23×D7312yes—
535C22×C4C23×D7311yescharacteristic
536SD16—14616no—
537D8—14616no—
538M16—216no—
539M16C2×C22⋊D73116yescomplemented
540C2×C8—22no—
541C2×C8—22no—
542C2×C8—28no—
543C2×C8—216no—
544C2×C8C2×C22⋊D7318yes—
545C2×C8C23×D7312yes—
546C2×C8C23×D7312yes—
547C2×C8C23×D7314yes—
548C4⋊C4—734no—
549C4⋊C4—732no—
550C4⋊C4—732no—
551C4⋊C4—1468no—
552C4⋊C4—1464no—
553C4⋊C4—1462no—
554C4⋊C4—1461no—
555C4⋊C4—1461no—
556C22⋊C4—1464no—
557C22⋊C4—1468no—
558C22⋊C4—1468no—
559C22⋊C4—1468no—
560C22⋊C4—1468no—
561C42—1464no—
562C23—22no—
563C23—22no—
564C23—24no—
565C23—24no—
566C23—24no—
567C23—2922no—
568C23—2924no—
569C23—2924no—
570C23—2922no—
571C23—2922no—
572C23—2928no—
573C23—2924no—
574C23—5844no—
575C23—5844no—
576C23—58416no—
577C23—1462no—
578C23—1464no—
579C23#1455656514yes—
580C23C22×D29214yes—
581C23C22×D29212yes—
582C23C22×D29211yescharacteristic
583Q8—28no—
584Q8—2922no—
585Q8—1462no—
586Q8—1462no—
587D4—216no—
588D4—28no—
589D4—2928no—
590D4—2924no—
591D4—2928no—
592D4—2922no—
593D4—5848no—
594D4—5848no—
595D4—5848no—
596D4—1462no—
597D4—1464no—
598D4—1464no—
599D4—1462no—
600C2×C4—24no—
601C2×C4—24no—
602C2×C4—24no—
603C2×C4—28no—
604C2×C4—2924no—
605C2×C4—2922no—
606C2×C4—2922no—
607C2×C4—2922no—
608C2×C4—2928no—
609C2×C4—5844no—
610C2×C4—1462no—
611C2×C4—1462no—
612C2×C4—1464no—
613C2×C4—1462no—
614C2×C4#1455656514yes—
615C2×C4#1455656518yes—
616C2×C4C22×C22⋊D7312yes—
617C2×C4C22×C22⋊D7314yes—
618C2×C4C22×D29214yes—
619C2×C4C22×D29212yes—
620C2×C4C22×D29211yescharacteristic
621C2×C4C2×#1192402812yes—
622C2×C4C2×#1192402814yes—
623C2×C4C24×D7311yescharacteristic
624C8—22no—
625C8—22no—
626C8C22×C22⋊D7318yes—
627C22—22no—
628C22—22no—
629C22—28no—
630C22—24no—
631C22—24no—
632C22—24no—
633C22—48no—
634C22—2922no—
635C22—2924no—
636C22—2922no—
637C22—2924no—
638C22—2924no—
639C22—2922no—
640C22—58416no—
641C22—5848no—
642C22—5844no—
643C22C2×#1455656514yes—
644C22C2×#1455656512yes—
645C22#1798939212yes—
646C22#1798939912yes—
647C22C23×D29211yescharacteristic
648C4—24no—
649C4—2924no—
650C4—2922no—
651C4—2922no—
652C4—2922no—
653C4C2×#1455656512yes—
654C4C2×#1455656514yes—
655C4C23×C22⋊D7311yescharacteristic
656C4C22×#1192402811yescharacteristic
657C2—24no—
658C2—44no—
659C2—5844no—
660C2—5842no—
661C2#2261961114yesdirect product factor
662C2C22×#1455656511yescharacteristic
663C2C2×#1798939211yescharacteristic
664C2C2×#1798939911yescharacteristic
subgroupG/H
centerC23C22×D292
commutator, cosocleC2×C4×C73C25
FrattiniC2×C4C24×D73
FittingC22×#131×C73C2
socleC23×C73C22×D4
hypercenterC22×#131D73
hypocenterC73C2×#3062
LCSG ▷ C2×C4×C73 ▷ C2×C73 ▷ C73
UCSC1 ◁ C23 ◁ C22×#41 ◁ C22×#131

Complements

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

NH ≅ G/Ntype
1. C22×#14556619C2semidirect
2. C2×#17989165C2semidirect
3. C2×#17989151C2semidirect
4. #22619611C2direct (N × H)
5. C2×#17988840C2semidirect
6. C2×#17988833C2semidirect
7. C2×#17988823C2semidirect
8. C2×#17988816C2semidirect
9. C2×#17988629C2semidirect
10. C2×#17988584C2semidirect
11. C22×#14556513C2semidirect
12. C22×#131×C73C2semidirect
16. C2×#14556619C22semidirect
20. #17989165C22semidirect
22. #17989151C22semidirect
25. C2×#14556570C22semidirect
29. C2×#14556565C22semidirect
35. #17988840C22semidirect
36. #17988833C22semidirect
37. #17988823C22semidirect
38. #17988816C22semidirect
39. #17988629C22semidirect
40. C2×#14556525C22semidirect
41. C2×#14556523C22semidirect
42. #17988584C22semidirect
43. C2×#14556516C22semidirect
44. C2×#14556516C22semidirect
47. C2×#14556513C22semidirect
48. C2×#14556513C22semidirect
49. C2×#14556513C22semidirect
52. C2×#131×C73C22semidirect
54. C22×M16×C73C22semidirect
56. C23×C8×C73C22semidirect
84. #14556570C23semidirect
91. #14556565C23semidirect
110. #14556525C23semidirect
111. #14556523C23semidirect
112. #14556516C23semidirect
113. #14556516C23semidirect
116. #14556513C23semidirect
117. #14556513C23semidirect
129. C2×M16×C73D4semidirect
131. C2×M16×C73C23semidirect
138. C22×C8×C73C23semidirect
220. M16×C73C2×D4semidirect
327. C2×C73#3062semidirect
334. C22×#131D73semidirect
345. C73C2×#3062semidirect
354. C2×#131C2×D73semidirect
356. C22×M16C2×D73semidirect
358. C23×C8C2×D73semidirect
425. C2×M16C22⋊D73semidirect
427. C2×M16C22×D73semidirect
434. C22×C8C22×D73semidirect
539. M16C2×C22⋊D73semidirect
661. C2#22619611direct (N × H)

Maximal subgroups

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

subgroupindex
C22×#145566192
C2×#179891652
C2×#179891512
#226196112
C2×#179888402
C2×#179888332
C2×#179888232
C2×#179888162
C2×#179886292
C2×#179885842
C22×#145565132
C22×#131×C732
C2×#306273