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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
156247131249437 ~1979
15625311500029779 ~1983
156259131251837 ~1979
156309793785837 ~1981
156311931262397 ~1979
1563143375154338 ~1982
1563259531508078 ~1982
1563409625363618 ~1983
156343393805997 ~1981
15634331094403119
1563511156351118 ~1981
156353931270797 ~1979
1563571281442798 ~1982
1563689500380498 ~1982
1563811250209778 ~1982
156385131277037 ~1979
156391131278237 ~1979
1563937375344898 ~1982
1563943156394318 ~1981
156395931279197 ~1979
156411793847037 ~1981
156442193865277 ~1981
1564421125153698
1564501344190238 ~1982
1564559125164738 ~1981
Exp. Prime Factor Digits Year
1564603531965038 ~1982
1564603625841218
1564679500697298 ~1982
156474193884477 ~1981
156486193891677 ~1981
1564949125195938 ~1981
1564949375587778
1565041469512318 ~1982
156509931301997 ~1979
156518331303677 ~1979
1565261125220898 ~1981
156547131309437 ~1979
1565471407022478
1565489125239138 ~1981
156552193931277 ~1981
156573793944237 ~1981
15658273664035199 ~1984
15659291127468899 ~1983
156593393955997 ~1981
1566079281894238 ~1982
1566079375858978
1566121250579378 ~1982
156613793968237 ~1981
156614331322877 ~1979
1566209501186898 ~1982
Exp. Prime Factor Digits Year
1566239281923038 ~1982
156657793994637 ~1981
1566577250652338
1566637250661938 ~1982
156673131334637 ~1979
156679394007597 ~1981
1566811156681118 ~1981
1566811250689778
1566811282025998
1566857219359998 ~1981
156692331338477 ~1979
156703131340637 ~1979
1567087156708718 ~1981
156710331342077 ~1979
1567133376111938 ~1982
156725931345197 ~1979
1567259125380738
156727131345437 ~1979
1567339752322738 ~1983
156736194041677 ~1981
1567411156741118 ~1981
1567411658312638
156749394049597 ~1981
156751394050797 ~1981
1567603627041218 ~1983
Exp. Prime Factor Digits Year
156766194059677 ~1981
1567667282180078 ~1982
1567693627077218 ~1983
1567771250843378 ~1982
1567837250853938 ~1982
15678472257699699 ~1984
1567903250864498 ~1982
1568041752659698 ~1983
156815931363197 ~1979
15682133136426019 ~1984
15682637684488719 ~1985
1568377250940338 ~1982
15683891756595699 ~1984
1568459282322638 ~1982
1568533376447938 ~1982
156854331370877 ~1979
156857931371597 ~1979
1568873470661918 ~1982
1568923376541538 ~1982
156895131379037 ~1979
1569011407942878 ~1982
156901394140797 ~1981
1569047125523778 ~1981
1569157251065138 ~1982
1569241345233038 ~1982
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25-04-06