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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
205256232052562319 ~1990
20525831410516638 ~1988
20525903410518078 ~1988
20526059410521198 ~1988
205261611642092899 ~1990
20526911410538238 ~1988
205270371231622239 ~1989
205272494515994799 ~1991
20527319410546398 ~1988
20527379410547598 ~1988
20527499410549998 ~1988
20527739410554798 ~1988
205278891642231139 ~1990
205284673284554739 ~1990
205287131231722799 ~1989
205288191642305539 ~1990
20528999410579998 ~1988
20529779410595598 ~1988
20530151410603038 ~1988
205302011231812079 ~1989
20530871410617438 ~1988
20530931410618638 ~1988
20531183410623678 ~1988
205312971642503779 ~1990
20531519410630398 ~1988
Exponent Prime Factor Digits Year
20531783410635678 ~1988
20531999410639998 ~1988
205323131231938799 ~1989
20532731410654638 ~1988
20532839410656798 ~1988
205335111642680899 ~1990
20533979410679598 ~1988
205340991642727939 ~1990
205342071642736579 ~1990
20534471410689438 ~1988
20534603410692078 ~1988
205347131232082799 ~1989
20534807213561992910 ~1992
20534831410696638 ~1988
20534879410697598 ~1988
205349571642796579 ~1990
205353792595671905711 ~1995
20535479410709598 ~1988
20535503410710078 ~1988
20536751410735038 ~1988
20536823410736478 ~1988
205370511642964099 ~1990
205370879857801779 ~1991
20537243410744878 ~1988
20538239410764798 ~1988
Exponent Prime Factor Digits Year
20538359410767198 ~1988
205383613286137779 ~1990
20538923410778478 ~1988
20539283410785678 ~1988
205392973286287539 ~1990
20539751410795038 ~1988
205398072053980719 ~1990
20539919410798398 ~1988
20539979410799598 ~1988
205404171643233379 ~1990
205404593697282639 ~1990
20540543410810878 ~1988
20540699410813998 ~1988
20540783410815678 ~1988
20540963410819278 ~1988
205413171232479039 ~1989
205414316573257939 ~1991
20541611410832238 ~1988
205416711643333699 ~1990
20542283410845678 ~1988
20542331410846638 ~1988
20542499410849998 ~1988
205425131232550799 ~1989
20542811410856238 ~1988
20543051410861038 ~1988
Exponent Prime Factor Digits Year
20543951410879038 ~1988
20544659410893198 ~1988
20545331410906638 ~1988
20546159410923198 ~1988
20546651410933038 ~1988
20547083410941678 ~1988
205472091643776739 ~1990
20547479410949598 ~1988
20547503410950078 ~1988
20547731410954638 ~1988
205480272054802719 ~1990
205482172876750399 ~1990
20548331410966638 ~1988
205486811232920879 ~1989
205488891643911139 ~1990
20548991410979838 ~1988
20549351410987038 ~1988
205497013287952179 ~1990
20549783410995678 ~1988
20549843410996878 ~1988
205499332876990639 ~1990
205499991643999939 ~1990
205500711644005699 ~1990
205502871644022979 ~1990
205506672055066719 ~1990
1431
GIMPS The Prime Pages FactorDb.com
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25-04-13