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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
256974371541846239 ~1990
25697663513953278 ~1989
25697891513957838 ~1989
25698131513962638 ~1989
25698251513965038 ~1989
256990619765643199 ~1992
25699259513985198 ~1989
256998892055991139 ~1990
25700219514004398 ~1989
25700231514004638 ~1989
257006112570061119 ~1991
25700723514014478 ~1989
257007771542046639 ~1990
25701359514027198 ~1989
25702619514052398 ~1989
25702811514056238 ~1989
25702823514056478 ~1989
25702931514058638 ~1989
25703003514060078 ~1989
25703663514073278 ~1989
25703819514076398 ~1989
25704071514081438 ~1989
25704383514087678 ~1989
25704491514089838 ~1989
257045171542271039 ~1990
Exponent Prime Factor Digits Year
25705523514110478 ~1989
25705871514117438 ~1989
25705931514118638 ~1989
25706423514128478 ~1989
257066411542398479 ~1990
25706783514135678 ~1989
257069531542417199 ~1990
257071131542426799 ~1990
257076531542459199 ~1990
25708211514164238 ~1989
25708223514164478 ~1989
25709003514180078 ~1989
25709063514181278 ~1989
25709303514186078 ~1989
257095874627725679 ~1991
25709891514197838 ~1989
25710263514205278 ~1989
25710491514209838 ~1989
25710719514214398 ~1989
25711271514225438 ~1989
25711391514227838 ~1989
25712363514247278 ~1989
25713071514261438 ~1989
25713599514271998 ~1989
25713959514279198 ~1989
Exponent Prime Factor Digits Year
25714439514288798 ~1989
257144392057155139
25714823514296478 ~1989
257148531542891199 ~1990
25715243514304878 ~1989
257152931542917599 ~1990
25715639514312798 ~1989
257160172057281379 ~1990
25716023514320478 ~1989
25716539514330798 ~1989
257168714114699379 ~1991
257169173600368399 ~1991
257172615657797439 ~1991
25717871514357438 ~1989
25717943514358878 ~1989
25718279514365598 ~1989
257183832571838319 ~1991
257186576172477699 ~1991
257190171543141039 ~1990
257190411543142479 ~1990
257191373600679199 ~1991
257194312057554499 ~1990
25719611169749432710 ~1993
25719959514399198 ~1989
25720511514410238 ~1989
Exponent Prime Factor Digits Year
25720631514412638 ~1989
25721939514438798 ~1989
25721963514439278 ~1989
25722743514454878 ~1989
25722863514457278 ~1989
25723559514471198 ~1989
25723679514473598 ~1989
25723811514476238 ~1989
25724123514482478 ~1989
25724183514483678 ~1989
25724399514487998 ~1989
25724411514488238 ~1989
25724483514489678 ~1989
257248914630480399 ~1991
25725083514501678 ~1989
25726511514530238 ~1989
25726583514531678 ~1989
25726691514533838 ~1989
257268731543612399 ~1990
25727291514545838 ~1989
257272972058183779 ~1990
25727711514554238 ~1989
25727771514555438 ~1989
25728119514562398 ~1989
257289912572899119 ~1991
1544
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24-10-27