72 734 693 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 =	625000
B2 =	12656250

Status	Date	User	Residue	Shift
Verified	2015-11-12	curtisc	EC921AD8C9FA6BE3	44138744
Verified	2024-04-06	Dmitriy Degtiarev	EC921AD8C9FA6BE3	18451473

History

Date	User	Type	Result
2024-04-06	Dmitriy Degtiarev	C-LL	EC921AD8C9FA6BE3
2015-11-12	curtisc	C-LL	EC921AD8C9FA6BE3
2015-03-25	ktony	NF-PM1	B1=625000, B2=12656250, E=12
2015-03-17	ktony	NF	no factor from 2^74 to 2^75
2015-03-17	ktony	NF	no factor from 2^73 to 2^74
2015-03-17	ktony	NF	no factor from 2^72 to 2^73
2015-03-17	ktony	NF	no factor from 2^71 to 2^72
2013-07-05	SMoffat	NF	no factor from 2^70 to 2^71
2012-10-18	tmorrow	NF	no factor from 2^69 to 2^70
2010-08-01	Allan Manangan	NF	no factor from 2^68 to 2^69
2010-05-30	unconnected	NF	no factor from 2^67 to 2^68
2010-05-27	unconnected	NF	no factor from 2^66 to 2^67
2010-05-25	-Anonymous-	NF	no factor from 2^65 to 2^66
2010-05-24	mczain chang	NF	no factor from 2^64 to 2^65
2008-09-22	-Anonymous-	NF	no factor to 2^64