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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
400954439622906339 ~1993
40095743801914878 ~1990
40098083801961678 ~1990
40098323801966478 ~1990
40098431801968638 ~1990
40099571801991438 ~1990
400997572405985439 ~1992
40100831802016638 ~1990
401021772406130639 ~1992
401029212406175279 ~1992
40103039802060798 ~1990
401035932406215599 ~1992
40103891802077838 ~1990
40105343802106878 ~1990
401054335614760639 ~1992
40105823802116478 ~1990
401064473208515779 ~1992
401065439625570339 ~1993
401085479626051299 ~1993
40108751802175038 ~1990
40110359802207198 ~1990
40110503802210078 ~1990
40111871802237438 ~1990
40113263802265278 ~1990
401137099627290179 ~1993
Exponent Prime Factor Digits Year
40114043802280878 ~1990
40114331802286638 ~1990
401163972406983839 ~1992
40116683802333678 ~1990
40117799802355998 ~1990
40117919802358398 ~1990
40118219802364398 ~1990
40118531802370638 ~1990
40120631802412638 ~1990
401210236419363699 ~1993
40121183802423678 ~1990
401224972407349839 ~1992
40122503802450078 ~1990
40122611802452238 ~1990
401242634012426319 ~1992
40124723802494478 ~1990
40124963802499278 ~1990
40125419802508398 ~1990
40125623802512478 ~1990
40125779802515598 ~1990
40126319802526398 ~1990
40126631802532638 ~1990
40127291802545838 ~1990
401276573210212579 ~1992
40128311802566238 ~1990
Exponent Prime Factor Digits Year
40128359802567198 ~1990
401293913210351299 ~1992
40130003802600078 ~1990
40130663802613278 ~1990
401311495618360879 ~1992
401326212407957279 ~1992
40133231802664638 ~1990
40133543802670878 ~1990
40134371802687438 ~1990
401343736421499699 ~1993
40134431802688620110 ~1995
40136399802727998 ~1990
401365572408193439 ~1992
40137983802759678 ~1990
40139111802782238 ~1990
40139171802783438 ~1990
401398932408393599 ~1992
40140539802810798 ~1990
401415535619817439 ~1992
40141943802838878 ~1990
401431277225762879 ~1993
40143263802865278 ~1990
40143479802869598 ~1990
40143563802871278 ~1990
40145243802904878 ~1990
Exponent Prime Factor Digits Year
40146251104380252710 ~1993
40146839802936798 ~1990
40147403802948078 ~1990
40147631802952638 ~1990
40148099802961998 ~1990
40148123802962478 ~1990
40148617120445851110 ~1993
40151003803020078 ~1990
401510573212084579 ~1992
40151519803030398 ~1990
40152383265005727910 ~1994
40153079803061598 ~1990
40154099803081998 ~1990
40154123803082478 ~1990
40154351803087038 ~1990
401551972409311839 ~1992
40156163803123278 ~1990
40156223803124478 ~1990
40157063803141278 ~1990
40157531803150638 ~1990
40158719803174398 ~1990
40159853128511529710 ~1993
40160063803201278 ~1990
40160339803206798 ~1990
401608313212866499 ~1992
1920
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25-05-04