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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
19758899395177998 ~1988
19759079395181598 ~1988
19759391395187838 ~1988
19759871395197438 ~1988
19759931395198638 ~1988
19760099395201998 ~1988
19760291395205838 ~1988
197606231976062319 ~1990
19760651395213038 ~1988
197607894742589379 ~1991
19761503395230078 ~1988
19761671395233438 ~1988
197616713557100799
197622133161954099 ~1990
19762271395245438 ~1988
19763099395261998 ~1988
197631671976316719 ~1990
19763519395270398 ~1988
19763791130441020710 ~1992
19763951395279038 ~1988
19764119395282398 ~1988
19764131395282638 ~1988
19764539395290798 ~1988
197645931185875599 ~1989
19764611395292238 ~1988
Exponent Prime Factor Digits Year
197647331185883999 ~1989
19764851395297038 ~1988
19765919395318398 ~1988
19766171395323438 ~1988
19766339395326798 ~1988
19766759395335198 ~1988
197674211186045279 ~1989
197676911976769119 ~1990
19767911395358238 ~1988
197679772767516799 ~1990
19768043395360878 ~1988
197685131186110799 ~1989
197689193558405439 ~1990
197695271976952719 ~1990
19769819395396398 ~1988
19770071395401438 ~1988
197702091581616739 ~1989
19770403126530579310 ~1992
19770599395411998 ~1988
19770743395414878 ~1988
197710331186261999 ~1989
197717832087900284911 ~1995
19771919395438398 ~1988
197732771186396639 ~1989
19773311395466238 ~1988
Exponent Prime Factor Digits Year
19773731395474638 ~1988
197738331186429999 ~1989
19773913138417391110 ~1992
19773959395479198 ~1988
19774151395483038 ~1988
19774211395484238 ~1988
19774523395490478 ~1988
19774691395493838 ~1988
19775363395507278 ~1988
19775603395512078 ~1988
19775771395515438 ~1988
19775831395516638 ~1988
19776671395533438 ~1988
19777139395542798 ~1988
19777883395557678 ~1988
197782331186693999 ~1989
19778663395573278 ~1988
19779059395581198 ~1988
197791631977916319 ~1990
19779659395593198 ~1988
19779863395597278 ~1988
197801572769221999 ~1990
19780259395605198 ~1988
19780499395609998 ~1988
19780679395613598 ~1988
Exponent Prime Factor Digits Year
197813273560638879 ~1990
19781423395628478 ~1988
19781543395630878 ~1988
19782023395640478 ~1988
19782299395645998 ~1988
19782419395648398 ~1988
19783241692413435110 ~1993
19783619395672398 ~1988
19783871395677438 ~1988
197839573165433139 ~1990
197841971187051839 ~1989
19785131395702638 ~1988
197853411187120479 ~1989
19786703395734078 ~1988
197867571582940579 ~1989
19786979395739598 ~1988
197874371187246239 ~1989
19787699395753998 ~1988
197878496332111699 ~1991
19788011395760238 ~1988
197883891583071139 ~1989
197885811583086499 ~1989
19788683395773678 ~1988
197887811187326879 ~1989
19789151395783038 ~1988
1405
GIMPS The Prime Pages FactorDb.com
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25-04-13