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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
266141953228397 ~1981
266173153234637 ~1981
2661733159703998 ~1982
2661781159706878 ~1982
26618212289166079 ~1985
2661943266194318 ~1983
2662069585655198 ~1984
2662193372707038 ~1983
2662271212981698 ~1983
2662459479242638 ~1984
2662501159750078 ~1982
2662507639001698 ~1984
266276353255277 ~1981
266281153256237 ~1981
266288353257677 ~1981
2662921159775278 ~1982
2662981159778878 ~1982
2663057213044578 ~1983
2663107266310718 ~1983
26631593408843539 ~1986
2663189372846478 ~1983
2663393799017918 ~1984
2663497799049118 ~1984
2663513799053918 ~1984
266365153273037 ~1981
Exp. Prime Factor Digits Year
26636772557129939 ~1985
2663867213109378 ~1983
2663897213111778 ~1983
266402353280477 ~1981
2664041852493138 ~1984
266405953281197 ~1981
2664127266412718 ~1983
2664149372980878 ~1983
2664241159854478 ~1982
2664271426283378 ~1983
2664553159873198 ~1982
2664793426366898 ~1983
2664901426384178 ~1983
2665021159901278 ~1982
2665121852838738 ~1984
2665181799554318 ~1984
266519953303997 ~1981
2665427213234178 ~1983
2665627426500338 ~1983
26656679169894499 ~1987
2665891266589118 ~1983
2665967639832098 ~1984
2666117159967038 ~1982
2666141213291298 ~1983
2666141799842318
Exp. Prime Factor Digits Year
2666197426591538 ~1983
2666197799859118
2666201159972078 ~1982
26665071333253519 ~1985
266651953330397 ~1981
266659153331837 ~1981
266666353333277 ~1981
2666663191999736110
2666747693354238 ~1984
2666791266679118 ~1983
2666891693391678 ~1984
2667191693469678 ~1984
2667503693550798 ~1984
2667611213408898 ~1983
266777953355597 ~1981
2667799266779918 ~1983
2668051480249198 ~1984
266809153361837 ~1981
2668103640344738 ~1984
2668199213455938 ~1983
2668213426914098 ~1983
26682711280770099 ~1985
26682711334135519
2668277213462178 ~1983
2668313160098798 ~1982
Exp. Prime Factor Digits Year
2668583693831598 ~1984
2668663426986098 ~1983
26686631120838479
26688491868194319 ~1985
26689073202688419 ~1986
26689994323778399 ~1986
2669167427066738 ~1983
2669281160156878 ~1982
26693271761755839 ~1985
2669369373711678 ~1983
2669389800816718 ~1984
2669417160165038 ~1982
2669549640691778 ~1984
2669591480526398 ~1984
2669857427177138 ~1983
266995153399037 ~1981
2670029213602338 ~1983
267019153403837 ~1981
2670341213627298 ~1983
2670449373862878 ~1983
2670491694327678 ~1984
2670677373894798 ~1983
2670793160247598 ~1982
2670797160247838 ~1982
2670797213663778
481
GIMPS The Prime Pages FactorDb.com
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26-07-19