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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
197051939410397 ~1980
1970599197059918 ~1982
1970627157650178 ~1982
1970677118240638 ~1981
1970713118242798 ~1981
1970729275902078 ~1982
19707291221851999
1970867473008098 ~1983
19709231300809199 ~1984
197102339420477 ~1980
19710295952507599 ~1986
1971127315380338 ~1982
197114339422877 ~1980
197125139425037 ~1980
1971329157706338 ~1982
1971401118284078 ~1981
197150339430077 ~1980
197165939433197 ~1980
1971709433775998 ~1983
1971799354923838 ~1983
1972207197220718 ~1982
1972307355015278 ~1983
19723792406302399 ~1985
19725111104606179 ~1984
1972627315620338 ~1982
Exp. Prime Factor Digits Year
197264339452877 ~1980
1972669789067618 ~1983
1972721631270738 ~1983
1972739596556273710 ~1988
1972787165714108110 ~1987
1972813473475138 ~1983
197282339456477 ~1980
1972829190969847310 ~1987
1972921315667378 ~1982
1972921591876318
1973011197301118 ~1982
1973113118386798 ~1981
1973297157863778 ~1982
1973317947192178 ~1984
1973527197352718 ~1982
1973539828886398 ~1983
1973813118428798 ~1981
197383139476637 ~1980
197390339478077 ~1980
1973927157914178 ~1982
1974121315859378 ~1982
1974403197440318 ~1982
1974433118465998 ~1981
19744332013921679
1974493118469598 ~1981
Exp. Prime Factor Digits Year
1974493789797218
197450339490077 ~1980
1974547473891298 ~1983
197474339494877 ~1980
197485139497037 ~1980
1974961118497678 ~1981
1974967197496718 ~1982
197501939500397 ~1980
1975021118501278 ~1981
197509139501837 ~1980
1975153118509198 ~1981
197516339503277 ~1980
197519939503997 ~1980
1975201434544238 ~1983
1975321118519278 ~1981
197551139510237 ~1980
1975517158041378 ~1982
1975613276585838 ~1982
1975619158049538 ~1982
197575139515037 ~1980
197593139518637 ~1980
19759577073926079 ~1986
1976017908967838 ~1984
197609939521997 ~1980
1976173118570398 ~1981
Exp. Prime Factor Digits Year
1976243513823198 ~1983
1976333118579998 ~1981
1976383671970238 ~1983
1976453118587198 ~1981
1976707672080398 ~1983
1976747158139778 ~1982
197675939535197 ~1980
1976789276750478 ~1982
1976861118611678 ~1981
1976929474462978 ~1983
197693939538797 ~1980
1976993118619598 ~1981
1977139355885038 ~1983
1977319197731918 ~1982
197735939547197 ~1980
1977361316377778 ~1982
1977427316388338 ~1982
19775571067880799 ~1984
197786339557277 ~1980
1978117474748098 ~1983
1978433593529918 ~1983
197852339570477 ~1980
1978673474881538 ~1983
1978807197880718 ~1982
19788535857404899 ~1985
395
GIMPS The Prime Pages FactorDb.com
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26-07-05