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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
197972691583781539 ~1989
19797539395950798 ~1988
197976711583813699 ~1989
197979011187874079 ~1989
19797983395959678 ~1988
19798451395969038 ~1988
19798643395972878 ~1988
197989271979892719 ~1990
197990572771867999 ~1990
197991918315660239 ~1991
19799231395984638 ~1988
19799459395989198 ~1988
19799519395990398 ~1988
19799579395991598 ~1988
19800239396004798 ~1988
198002511584020099 ~1989
19800491396009838 ~1988
19800611396012238 ~1988
19800743396014878 ~1988
19801511396030238 ~1988
198019492772272879 ~1990
19802663396053278 ~1988
19802771396055438 ~1988
19802879396057598 ~1988
19802963396059278 ~1988
Exponent Prime Factor Digits Year
19803323396066478 ~1988
19803431396068638 ~1988
19803743396074878 ~1988
19804079396081598 ~1988
19804223396084478 ~1988
19804283396085678 ~1988
19804871396097438 ~1988
198048713564876799
198060011188360079 ~1989
19806119396122398 ~1988
19806383396127678 ~1988
198064811188388879 ~1989
19806491396129838 ~1988
198066975942009119 ~1991
19806851396137038 ~1988
19807019396140398 ~1988
19807103396142078 ~1988
198079671584637379 ~1989
198081771188490639 ~1989
19808303396166078 ~1988
198088071584704579 ~1989
198099411188596479 ~1989
19810139396202798 ~1988
19810163396203278 ~1988
19810211396204238 ~1988
Exponent Prime Factor Digits Year
198103131188618799 ~1989
19810391396207838 ~1988
19810919396218398 ~1988
198112931188677599 ~1989
19811339396226798 ~1988
19812179396243598 ~1988
198124513169992179 ~1990
198126971188761839 ~1989
19813883396277678 ~1988
19813919396278398 ~1988
19814303396286078 ~1988
198148971188893839 ~1989
19814939396298798 ~1988
19815203396304078 ~1988
19815311396306238 ~1988
19816319396326398 ~1988
19817471396349438 ~1988
198177371189064239 ~1989
19817783396355678 ~1988
198178732774502239 ~1990
19817939396358798 ~1988
19818059396361198 ~1988
19818671396373438 ~1988
19819391396387838 ~1988
19819511396390238 ~1988
Exponent Prime Factor Digits Year
19819619396392398 ~1988
198196211189177279 ~1989
19819799396395998 ~1988
19819979396399598 ~1988
19820063396401278 ~1988
19820219396404398 ~1988
19820473126851027310 ~1992
19820711396414238 ~1988
198210131189260799 ~1989
19821863396437278 ~1988
19822559396451198 ~1988
19822571396451438 ~1988
19823159158585272110 ~1992
19823423396468478 ~1988
198237674757704099 ~1991
198241132775375839 ~1990
19824251396485038 ~1988
19824323396486478 ~1988
19824503396490078 ~1988
19824659396493198 ~1988
19824671396493438 ~1988
19824743396494878 ~1988
19824911396498238 ~1988
19825163396503278 ~1988
198251713172027379 ~1990
1412
GIMPS The Prime Pages FactorDb.com
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25-05-04