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 A172290 Prime divisors of 2^1092-1, listed with multiplicities. 5
 3, 3, 5, 7, 7, 13, 13, 29, 43, 53, 79, 113, 127, 157, 313, 337, 547, 911, 1093, 1093, 1249, 1429, 1613, 2731, 3121, 4733, 5419, 8191, 14449, 21841, 121369, 224771, 503413, 1210483, 1948129, 22366891, 108749551, 112901153, 23140471537, 25829691707, 105310750819, 467811806281, 4093204977277417, 8861085190774909, 556338525912325157, 86977595801949844993, 275700717951546566946854497, 292653113147157205779127526827, 3194753987813988499397428643895659569 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Up to now only two primes p such that p^2 divide 2^(p-1)-1 are known (these two are Wieferich primes see A001220). The sequence is finite with A001222(2^1092-1)=49 terms; A001221(2^1092-1)=45. [From Reinhard Zumkeller, May 14 2010] Terms appearing more than once (in fact twice) are 3, 7, 13, and 1093. LINKS R. Zumkeller, Table of n, a(n) for n = 1..49 (complete sequence) Dario A. Alpern, Factorization using the Elliptic Curve Method [From Reinhard Zumkeller, May 14 2010] CROSSREFS Cf. A001220, A172291-A172293, A177855, A046051, A046800. Sequence in context: A050826 A086910 A101300 * A076524 A168279 A171957 Adjacent sequences:  A172287 A172288 A172289 * A172291 A172292 A172293 KEYWORD fini,full,nonn AUTHOR Artur Jasinski, Jan 30 2010 EXTENSIONS Missing terms a(34) and a(35) inserted by Reinhard Zumkeller, May 14 2010 Definition clarified corrected by Joerg Arndt, Apr 25 2011 STATUS approved

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Last modified May 25 20:58 EDT 2020. Contains 334597 sequences. (Running on oeis4.)