72 877 417 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 =	670000
B2 =	13902500

Status	Date	User	Residue	Shift
Verified	2017-05-25	Shnobel	4D5EEF6416E6D6E2	66457627
Verified	2024-10-11	JuandeJ	4D5EEF6416E6D6E2	27243010

History

Date	User	Type	Result
2024-10-11	JuandeJ	C-LL	4D5EEF6416E6D6E2
2017-05-25	Shnobel	C-LL	4D5EEF6416E6D6E2
2016-06-17	-Anonymous-	NF	no factor from 2^74 to 2^75
2014-10-18	James Heinrich	NF-PM1	B1=670000, B2=13902500, E=6
2014-10-10	kdgehman	NF	no factor from 2^73 to 2^74
2014-10-09	kdgehman	NF	no factor from 2^72 to 2^73
2014-10-09	kdgehman	NF	no factor from 2^71 to 2^72
2012-11-20	AllRandom	NF	no factor from 2^70 to 2^71
2012-10-03	ANONYMOUS	NF	no factor from 2^69 to 2^70
2010-07-29	Bold_Seeker	NF	no factor from 2^68 to 2^69
2010-07-28	Bold_Seeker	NF	no factor from 2^67 to 2^68
2010-07-27	Bold_Seeker	NF	no factor from 2^66 to 2^67
2010-07-27	linded	NF	no factor from 2^65 to 2^66
2010-07-23	TeraTism	NF	no factor from 2^64 to 2^65
2008-09-19	Wojciech Florek	NF	no factor to 2^64