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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
1988941914912878 ~1984
198896339779277 ~1980
198899939779997 ~1980
1989073437596078 ~1983
198913139782637 ~1980
19891611113930179 ~1984
1989479159158338 ~1982
1989551835611438 ~1983
198956339791277 ~1980
1989583477499938 ~1983
1989721318355378 ~1982
1989847198984718 ~1982
19900072746209679 ~1985
1990111835846638 ~1983
199015139803037 ~1980
1990171358230798 ~1983
1990447199044718 ~1982
1990463517520398 ~1983
199055939811197 ~1980
19905592070181379
1990621437936638 ~1983
199082339816477 ~1980
199088339817677 ~1980
1990939358369038 ~1983
199112339822477 ~1980
Exp. Prime Factor Digits Year
1991251358425198 ~1983
1991489159319138 ~1982
199151939830397 ~1980
1991609477986178 ~1983
1991879358538238 ~1983
1991881119512878 ~1981
1991911199191118 ~1982
19919291394350319 ~1984
199196339839277 ~1980
199199939839997 ~1980
1992073119524398 ~1981
1992181318748978 ~1982
199229939845997 ~1980
1992299159383938
1992583199258318 ~1982
1992631199263118 ~1982
1992719159417538 ~1982
1992803836977278 ~1983
1992971837047838 ~1983
199303139860637 ~1980
1993087199308718 ~1982
199315139863037 ~1980
1993247159459778 ~1982
199325939865197 ~1980
1993259358786638
Exp. Prime Factor Digits Year
1993349279068878 ~1982
1993367996683518 ~1984
1993477119608638 ~1981
1993531358835598 ~1983
1993603199360318 ~1982
1993631159490498 ~1982
1993637119618238 ~1981
199364339872877 ~1980
1993661159492898 ~1982
1993681272336824710 ~1987
1993759199375918 ~1982
1993933478543938 ~1983
1993933598179918
1993973279156238 ~1982
1994227319076338 ~1982
199433939886797 ~1980
1994437319109938 ~1982
1994477119668638 ~1981
1994497478679298 ~1983
199451939890397 ~1980
1994621119677278 ~1981
1994647319143538 ~1982
1994687359043678 ~1983
1994717279260398 ~1982
1994777279268798 ~1982
Exp. Prime Factor Digits Year
199487939897597 ~1980
1994911319185778 ~1982
199502339900477 ~1980
1995221119713278 ~1981
1995221159617698
1995223478853538 ~1983
19953911436681539 ~1984
199543139908637 ~1980
1995547359198478 ~1983
199561139912237 ~1980
1995787359241678 ~1983
1995827359248878 ~1983
199597139919437 ~1980
1995977119758638 ~1981
1996207678710398 ~1983
199622339924477 ~1980
1996229279472078 ~1982
199628339925677 ~1980
199634339926877 ~1980
1996613638916178 ~1983
1996711199671118 ~1982
199676339935277 ~1980
1996817159745378 ~1982
1996859159748738 ~1982
1996937119816238 ~1981
389
GIMPS The Prime Pages FactorDb.com
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