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 2010-12-27, 13:37 #1 allasc   Aug 2010 SPb 2216 Posts Please help me find a composite number (test2) Numbers n such that 2^(2*n)-1 = 63 (mod 3*(n+2)), 2^(n-1) == 1(mod n) and n == 6 (mod 7) 83, 293, 503, 1553, 2393, 3863, 4283, 4703, 6803, 7433, 7853, 9533, 9743, 11213, 12893, 13103, 13313, 14783, 15413, 16253 in OEIS add A173654 all elements satisfy the condition.A141570 Primes of the form 2*3*5*7*n+83.Our sequence is a subsequence for A141570 please help me find a pseudo-prime element of my sequence ps verified for n<5*10^8 ps2 768440063 topic can be removed Last fiddled with by allasc on 2010-12-27 at 14:29

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