48 463 939 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 2⁷⁷

TF target 2⁷²

P-1

B1 =	1500000
B2 =	45000000

Status	Date	User	Residue	Shift
Verified	2011-03-09	curtisc	F07D138F14635861	1907113
Verified	2018-06-13	dcromster	F07D138F14635861	15305435

History

Date	User	Type	Result
2021-06-23	-Anonymous-	NF	no factor from 2^76 to 2^77
2021-06-15	-Anonymous-	NF	no factor from 2^75 to 2^76
2021-06-15	-Anonymous-	NF	no factor from 2^74 to 2^75
2021-03-03	Sid & Andy	NF-PM1	B1=1500000, B2=45000000
2020-01-17	-Anonymous-	NF	no factor from 2^73 to 2^74
2018-06-13	dcromster	C-LL	F07D138F14635861
2018-02-23	-Anonymous-	NF	no factor from 2^72 to 2^73
2015-11-20	-Anonymous-	NF	no factor from 2^71 to 2^72
2015-07-01	Mark Rose	NF	no factor from 2^70 to 2^71
2015-06-30	Sid & Andy	NF	no factor from 2^69 to 2^70
2011-03-09	curtisc	C-LL	F07D138F14635861
2010-06-04	linded	NF-PM1	B1=535000, B2=9763750