19 583 999 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

TF

No factors below 2⁷⁴

TF target 2⁶⁹

P-1

B1 =	800000
B2 =	820558662

Status	Date	User	Residue	Shift
Verified	2003-10-23	Régis DE MEUTER	BAF321952948622E	14085009
Verified	2007-10-29	Jacques Charles	BAF321952948622E	11700420

History

Date	User	Type	Result
2022-01-14	axn	NF-PM1	B1=800000, B2=820558662
2022-01-11	TheJudger	NF	no factor from 2^73 to 2^74
2021-11-26	-Anonymous-	NF	no factor from 2^72 to 2^73
2021-10-08	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-09-25	SRBase	NF	no factor from 2^70 to 2^71
2021-09-21	mikr	NF	no factor from 2^70 to 2^71
2019-12-01	lycorn	NF	no factor from 2^69 to 2^70
2017-11-03	ramgeis	NF	no factor from 2^68 to 2^69
2016-05-07	Numberwang	NF-PM1	B1=200000, B2=3700000, E=6
2014-05-12	Nesowa	NF	no factor from 2^67 to 2^68
2014-05-12	Nesowa	NF	no factor from 2^66 to 2^67