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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
195527939105597 ~1980
1955279977639518
1955417117325038 ~1981
1955531156442498 ~1982
195554339110877 ~1980
1955671821381838 ~1983
195571139114237 ~1980
195577139115437 ~1980
195593939118797 ~1980
1955959665026078 ~1983
1956029586808718 ~1983
19562874264705679 ~1985
195632339126477 ~1980
195635939127197 ~1980
1956583195658318 ~1982
195659939131997 ~1980
1956631782652418 ~1983
1956637117398238 ~1981
19566672230600399 ~1984
1956761117405678 ~1981
1956793117407598 ~1981
1956793313086898
1957013117420798 ~1981
1957037156562978 ~1982
1957049156563938 ~1982
Exp. Prime Factor Digits Year
195739139147837 ~1980
1957469156597538 ~1982
1957477313196338 ~1982
195752339150477 ~1980
195758339151677 ~1980
19576391252888979 ~1984
1957799156623938 ~1982
1957801313248178 ~1982
195785939157197 ~1980
1958069587420718 ~1983
1958431195843118 ~1982
195853139170637 ~1980
1958557117513438 ~1981
19585633016187039 ~1985
195859139171837 ~1980
1958633117517998 ~1981
1958681117520878 ~1981
1958731313396978 ~1982
1958777156702178 ~1982
1958897156711778 ~1982
19590531057888639 ~1984
195917939183597 ~1980
1959179156734338
1959197274287598 ~1982
1959283195928318 ~1982
Exp. Prime Factor Digits Year
1959313117558798 ~1981
195937139187437 ~1980
195959939191997 ~1980
1959689274356478 ~1982
195973139194637 ~1980
1959751195975118 ~1982
1959967352794078 ~1982
19599731999172479 ~1984
1960183196018318 ~1982
1960213117612798 ~1981
196037939207597 ~1980
1960397117623838 ~1981
1960481156838498 ~1982
1960481941030898
1960529588158718 ~1983
196064339212877 ~1980
1960837470600898 ~1983
1960913627492178 ~1983
196097939219597 ~1980
1961039156883138 ~1982
1961077313772338 ~1982
1961131313780978 ~1982
196123139224637 ~1980
19612311922006399
1961431941486898 ~1983
Exp. Prime Factor Digits Year
1961461117687678 ~1981
196148339229677 ~1980
1961581313852978 ~1982
196165139233037 ~1980
19618632197286579 ~1984
19618991412567299 ~1984
196201139240237 ~1980
1962139667127278 ~1983
19621933728166719 ~1985
1962209588662718 ~1983
1962271196227118 ~1982
1962307353215278 ~1982
1962409431729998 ~1983
196241939248397 ~1980
1962449274742878 ~1982
19624492001697999
1962731157018498 ~1982
1962847314055538 ~1982
196331939266397 ~1980
1963397157071778 ~1982
1963981314236978 ~1982
196415939283197 ~1980
196424339284877 ~1980
1964297117857838 ~1981
1964297275001598
377
GIMPS The Prime Pages FactorDb.com
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25-04-06