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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
12856859257137198 ~1987
12857843257156878 ~1987
128580171028641379 ~1988
12858743257174878 ~1987
128588473086123299 ~1989
128589293857678719 ~1989
12858971257179438 ~1987
12859211257184238 ~1987
12860033771601998 ~1988
12860051257201038 ~1987
12860363257207278 ~1987
128604591028836739 ~1988
12860501771630078 ~1988
128605971028847779 ~1988
12860723257214478 ~1987
12860759257215198 ~1987
12860819257216398 ~1987
128612271028898179 ~1988
12861281771676878 ~1988
128613791286137919 ~1988
128615172057842739 ~1989
12861743257234878 ~1987
128623014887674399 ~1990
12862823257256478 ~1987
12862901771774078 ~1988
Exponent Prime Factor Digits Year
12863297771797838 ~1988
12863723257274478 ~1987
128639273344621039 ~1989
12864191257283838 ~1987
12864541771872478 ~1988
12864623257292478 ~1987
128653099263022499 ~1990
12866219257324398 ~1987
12866351257327038 ~1987
128668031286680319 ~1988
12866831257336638 ~1987
12866873772012398 ~1988
128669391029355139 ~1988
12867059257341198 ~1987
128672232058755699 ~1989
12867311257346238 ~1987
12867443257348878 ~1987
12867611257352238 ~1987
12867719257354398 ~1987
12867779257355598 ~1987
128677791029422339
128678391029427139 ~1988
12868319257366398 ~1987
12868343257366878 ~1987
12868463257369278 ~1987
Exponent Prime Factor Digits Year
128689911029519299 ~1988
12869413772164798 ~1988
128695671029565379 ~1988
128699334118378579 ~1989
128700791287007919 ~1988
12870541772232478 ~1988
12870899257417998 ~1987
12870971257419438 ~1987
12871451257429038 ~1987
12871583257431678 ~1987
12871613772296798 ~1988
128716311029730499 ~1988
128717511029740099 ~1988
12872003257440078 ~1987
12872039257440798 ~1987
12872423257448478 ~1987
12872933772375998 ~1988
12873041772382478 ~1988
12873083257461678 ~1987
12873197110709494310 ~1991
12873551257471038 ~1987
12873803257476078 ~1987
12874223257484478 ~1987
128742233089813539
128743271287432719 ~1988
Exponent Prime Factor Digits Year
12875003257500078 ~1987
128751291802518079 ~1989
128754972060079539 ~1989
12875771257515438 ~1987
12875903257518078 ~1987
12876161772569678 ~1988
12876179257523598 ~1987
12876491257529838 ~1987
12876659257533198 ~1987
128769531802773439 ~1989
12877223257544478 ~1987
12877379257547598 ~1987
12877703257554078 ~1987
12877883257557678 ~1987
12878111257562238 ~1987
12878483257569678 ~1987
12879239257584798 ~1987
128794093091058179 ~1989
12879623257592478 ~1987
12880151257603038 ~1987
128805231422009739311 ~1993
12880691257613838 ~1987
12880919257618398 ~1987
12881171257623438 ~1987
128812991288129919 ~1988
1178
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25-09-07