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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.
Exp. Prime Factor Digits Year
15373695411538899 ~1985
153743930748797 ~1979
1537457461237118 ~1982
1537517123001378 ~1981
153755930751197 ~1979
153769130753837 ~1979
1537771738130098 ~1983
1537799123023938 ~1981
153781392268797 ~1980
1537937461381118 ~1982
1538027276844878 ~1982
153805792283437 ~1980
1538057215327998
1538081492185938 ~1982
1538087738281778 ~1983
1538191153819118 ~1981
1538213215349838 ~1981
1538281707609278 ~1983
1538311153831118 ~1981
153835392301197 ~1980
15384411569209839 ~1983
15384911476951379 ~1983
1538531123082498 ~1981
1538587153858718 ~1981
1538743646272078 ~1983
Exp. Prime Factor Digits Year
1538807276985278 ~1982
1538837461651118 ~1982
153887930777597 ~1979
1538939277009038 ~1982
153895130779037 ~1979
153896330779277 ~1979
1538963369351138
153925392355197 ~1980
1539331125609409710 ~1986
1539389123151138 ~1981
1539479492633298 ~1982
153955792373437 ~1980
1539619153961918 ~1981
1539661338725438 ~1982
153973792384237 ~1980
1539773369545538 ~1982
1540003154000318 ~1981
1540003523601038
1540027246404338 ~1982
154007930801597 ~1979
1540141616056418 ~1982
154015130803037 ~1979
1540207246433138 ~1982
1540243616097218 ~1982
1540309338867998 ~1982
Exp. Prime Factor Digits Year
154040330808077 ~1979
154045392427197 ~1980
1540543369730338 ~1982
154055930811197 ~1979
154057392434397 ~1980
15406211478996179 ~1983
1540687154068718 ~1981
1540699154069918 ~1981
154075130815037 ~1979
154085930817197 ~1979
15408591972299539
1540879369810978 ~1982
15409011694991119 ~1984
154105130821037 ~1979
154106330821277 ~1979
154136330827277 ~1979
154145392487197 ~1980
1541597462479118 ~1982
154165130833037 ~1979
1541699123335938 ~1981
154177392506397 ~1980
1541779647547198 ~1983
154187392512397 ~1980
1541921123353698 ~1981
1542043616817218 ~1982
Exp. Prime Factor Digits Year
1542119123369538 ~1981
15424731326526799 ~1983
1542551493616338 ~1982
1542551647871438
1542691154269118 ~1981
1542727154272718 ~1981
1542841246854578 ~1982
1542881123430498 ~1981
15429174073300899 ~1985
1543013493764178 ~1982
1543033339467278 ~1982
1543033617213218
1543051154305118 ~1981
15432791265488799 ~1983
1543319370396578 ~1982
154333792600237 ~1980
1543429833451678 ~1983
154351130870237 ~1979
1544077617630818 ~1983
1544113247058098 ~1982
1544167617666818 ~1983
154417130883437 ~1979
1544201463260318 ~1982
154421930884397 ~1979
154442330888477 ~1979
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