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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
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
1979101118746078 ~1981
197917139583437 ~1980
1979227672937198 ~1983
197929139585837 ~1980
19793213919055599 ~1985
1979717118783038 ~1981
1979941316790578 ~1982
1979941435587038
Exp. Prime Factor Digits Year
1979941593982318
1980073475217538 ~1983
19801132494942399 ~1985
1980281118816878 ~1981
1980397316863538 ~1982
1980659158452738 ~1982
1980761118845678 ~1981
1980791356542398 ~1982
198098339619677 ~1980
1981081118864878 ~1981
19810812218810739
1981141435851038 ~1983
1981181118870878 ~1981
1981267475504098 ~1983
198140339628077 ~1980
19815171070019199 ~1984
198163139632637 ~1980
1981649277430878 ~1982
1981699673777678 ~1983
1981853118911198 ~1981
1981883515289598 ~1983
1981891317102578 ~1982
1982011198201118 ~1982
198215939643197 ~1980
1982159158572738
Exp. Prime Factor Digits Year
1982203198220318 ~1982
1982381158590498 ~1982
1982401317184178 ~1982
1982467198246718 ~1982
198247139649437 ~1980
1982471158597698
198272339654477 ~1980
1982809475874178 ~1983
198289139657837 ~1980
1982891158631298
1982909277607278 ~1982
198295139659037 ~1980
19829692181265919 ~1984
1983019832867998 ~1983
1983383515679598 ~1983
198356339671277 ~1980
1983601436392238 ~1983
1983689753801838 ~1983
1983701119022078 ~1981
198374339674877 ~1980
1983749595124718 ~1983
1983833119029998 ~1981
1984007158720578 ~1982
1984061119043678 ~1981
198409139681837 ~1980
Exp. Prime Factor Digits Year
1984109158728738 ~1982
1984181119050878 ~1981
198427139685437 ~1980
1984343476242338 ~1983
1984399198439918 ~1982
19844291428788899 ~1984
1984753436645678 ~1983
19848171905424339 ~1984
1984859357274638 ~1982
19849212699492579 ~1985
198499139699837 ~1980
198505139701037 ~1980
1985057476413698 ~1983
1985239476457378 ~1983
1985293119117598 ~1981
1985293436764478
1985453476508738 ~1983
1985509476522178 ~1983
19855512223817139 ~1984
19855911588472819 ~1984
1985771635446738 ~1983
1985791357442398 ~1982
1985897158871778 ~1982
198593939718797 ~1980
1986001119160078 ~1981
380
GIMPS The Prime Pages FactorDb.com
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25-04-13