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Small Mersenne Prime Factors
Prime numbers of the form Mp= 2p − 1 are called Mersenne primes. For Mp to be prime, p must also be prime.
Any factor q of a Mersenne number 2p − 1 must be of the form 2kp + 1, where integer k ≥ 0. Furthermore, q must be 1 or 7 mod 8.
Exponent Prime Factor Digits Year
20954639419092798 ~1988
209547073352753139 ~1990
209548075448249839 ~1991
20955563419111278 ~1988
20955743419114878 ~1988
209558771257352639 ~1989
209559711676477699 ~1990
20956283419125678 ~1988
20956343419126878 ~1988
20956583419131678 ~1988
209566793772202239 ~1990
209569637125367439 ~1991
209571771257430639 ~1989
20957819419156398 ~1988
20958023419160478 ~1988
20958251419165038 ~1988
209585571257513439 ~1989
20958803419176078 ~1988
209589072095890719 ~1990
209589611257537679 ~1989
209590211257541279 ~1989
20959091419181838 ~1988
20959331419186638 ~1988
20959511201211305710 ~1992
20960183419203678 ~1988
Exponent Prime Factor Digits Year
20960339419206798 ~1988
209604133353666099 ~1990
209608931257653599 ~1989
209611211257667279 ~1989
20961131419222638 ~1988
209615298384611619 ~1991
209615592096155919 ~1990
20961779419235598 ~1988
20961851419237038 ~1988
20962031419240638 ~1988
20962163419243278 ~1988
20962307188660763110 ~1992
20962391419247838 ~1988
20962631419252638 ~1988
20962811368945473710 ~1993
209647811257886879 ~1989
20964803419296078 ~1988
20965079419301598 ~1988
209655131257930799 ~1989
209656011257936079 ~1989
20966171419323438 ~1988
209662032096620319 ~1990
20966591419331838 ~1988
209670411677363299 ~1990
20967059419341198 ~1988
Exponent Prime Factor Digits Year
20967371419347438 ~1988
209676891677415139 ~1990
209677992096779919 ~1990
20967983419359678 ~1988
20968091419361838 ~1988
20969099419381998 ~1988
20969303419386078 ~1988
20970011419400238 ~1988
20970143419402878 ~1988
20970923419418478 ~1988
20971271419425438 ~1988
20972123419442478 ~1988
209724171258345039 ~1989
209728675452945439 ~1991
20973059419461198 ~1988
20973383419467678 ~1988
20973731419474638 ~1988
20973791419475838 ~1988
20973863419477278 ~1988
209741592097415919 ~1990
20975219419504398 ~1988
209754531258527199 ~1989
20975711419514238 ~1988
209758331258549999 ~1989
20975879419517598 ~1988
Exponent Prime Factor Digits Year
20975939419518798 ~1988
20977139419542798 ~1988
209772171678177379 ~1990
20977811419556238 ~1988
20978123419562478 ~1988
20978159419563198 ~1988
20978843419576878 ~1988
209793235035037539 ~1991
209793531258761199 ~1989
209793591678348739 ~1990
209794331258765999 ~1989
20979443419588878 ~1988
20979551419591038 ~1988
20980331419606638 ~1988
20980391419607838 ~1988
209805011258830079 ~1989
20981099419621998 ~1988
20981711419634238 ~1988
20982191419643838 ~1988
20982803419656078 ~1988
20983031419660638 ~1988
20983043419660878 ~1988
20984123419682478 ~1988
20984339419686798 ~1988
20984363419687278 ~1988
1461
GIMPS The Prime Pages FactorDb.com
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25-06-08