73 925 161 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 2⁷⁵

TF target 2⁷⁴

P-1

B1 =	1750000
B2 =	75000000

Status	Date	User	Residue	Shift
Verified	2017-08-08	basey	58555893FA5B223E	30440286
Verified	2017-10-04	curtisc	58555893FA5B223E	64873292

History

Date	User	Type	Result
2017-10-04	curtisc	C-LL	58555893FA5B223E
2017-08-08	basey	C-LL	58555893FA5B223E
2016-04-02	Mark Rose	NF	no factor from 2^57 to 2^64
2015-11-09	Craig Meyers	NF-PM1	B1=1750000, B2=75000000, e=6
2015-10-24	AirSquirrels	NF	no factor from 2^74 to 2^75
2015-10-24	AirSquirrels	NF	no factor from 2^73 to 2^74
2015-10-03	Judge Hale	NF	no factor from 2^72 to 2^73
2015-05-16	el grocco	NF	no factor from 2^71 to 2^72
2013-08-04	PascalBieri	NF	no factor from 2^70 to 2^71
2012-10-13	SMoffat	NF	no factor from 2^69 to 2^70
2011-03-04	ITS	NF	no factor from 2^68 to 2^69
2011-02-28	ITS	NF	no factor from 2^67 to 2^68
2011-02-25	ITS	NF	no factor from 2^66 to 2^67
2011-02-21	ITS	NF	no factor from 2^65 to 2^66
2010-12-17	Charles Spalton	NF	no factor from 2^64 to 2^65