My Math Forum A new way to write factorial (p-1)! ?

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 January 31st, 2010, 03:58 PM #21 Senior Member   Joined: Nov 2007 Posts: 633 Thanks: 0 Re: A new way to write factorial (p-1)! ? Here are the values for 100! (p=101) p-i x a(i) 100 1 1 99 51 50 98 34 33 97 76 73 96 81 77 95 17 16 94 29 27 93 38 35 92 45 41 91 91 82 90 46 41 89 59 52 88 70 61 87 65 56 86 27 23 85 19 16 84 6 5 83 73 60 82 16 13 81 96 77 80 77 61 79 23 18 78 22 17 77 80 61 76 97 73 75 35 26 74 15 11 73 83 60 72 7 5 71 64 45 70 88 61 69 60 41 68 49 33 67 3 2 66 26 17 65 87 56 64 71 45 63 8 5 62 57 35 61 48 29 60 69 41 59 89 52 58 47 27 57 62 35 56 9 5 55 11 6 54 43 23 53 40 21 52 33 17 51 99 50 50 2 1 You see that for 91 x=91 and for 10 x=10. So it is better to put those values aside until you finish removing all the values of the list L. I did not remove the numbers but you can see the steps. I did it using Excel. I know it is little bit hard to implement.
 May 29th, 2017, 05:30 AM #22 Banned Camp   Joined: Dec 2013 Posts: 1,117 Thanks: 41 Another one about factorials under the nick Momo which is mine

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# which factorials are "-1 mod p"

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