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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
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
1974493789797218
197450339490077 ~1980
1974547473891298 ~1983
197474339494877 ~1980
197485139497037 ~1980
Exp. Prime Factor Digits Year
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 ~1983
197609939521997 ~1980
1976173118570398 ~1981
1976243513823198 ~1983
1976333118579998 ~1981
1976383671970238 ~1983
1976453118587198 ~1981
1976707672080398 ~1983
Exp. Prime Factor Digits Year
1976747158139778 ~1982
197675939535197 ~1980
1976789276750478 ~1982
1976861118611678 ~1981
1976929474462978 ~1983
197693939538797 ~1980
1976993118619598 ~1981
1977139355885038 ~1982
1977319197731918 ~1982
197735939547197 ~1980
1977361316377778 ~1982
1977427316388338 ~1982
19775571067880799 ~1984
197786339557277 ~1980
1978117474748098 ~1983
1978433593529918 ~1983
197852339570477 ~1980
1978673474881538 ~1983
1978807197880718 ~1982
19788535857404899 ~1985
1978913406468730310 ~1988
1978927197892718 ~1982
1979039356227038 ~1982
197905139581037 ~1980
1979051158324098
Exp. Prime Factor Digits Year
1979101118746078 ~1981
197917139583437 ~1980
1979227672937198 ~1983
197929139585837 ~1980
19793213919055599 ~1985
1979717118783038 ~1981
1979941316790578 ~1982
1979941435587038
1979941593982318
1980073475217538 ~1983
19801132494942399 ~1985
1980281118816878 ~1981
1980397316863538 ~1982
19805211227923039 ~1984
1980659158452738 ~1982
1980761118845678 ~1981
1980791356542398 ~1982
198098339619677 ~1980
1981081118864878 ~1981
19810812218810739
1981141435851038 ~1983
1981181118870878 ~1981
1981267475504098 ~1983
198140339628077 ~1980
19815171070019199 ~1984
387
GIMPS The Prime Pages FactorDb.com
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25-10-26