15 050 767 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 2⁷³

TF target 2⁶⁹

P-1

B1 =	1800000
B2 =	754129740

ECM

Digits	B1	Curves
25	50000	14 / 280

Estimated T-Level: 20.3 ⓘ

Status	Date	User	Residue	Shift
Verified	2002-06-23	S05520	9949E0CE11F959F7	3017383
Verified	2005-10-18	Oren Pinsky	9949E0CE11F959F7	12670304

History

Date	User	Type	Result
2024-05-28	Sid & Andy	NF-PM1	B1=1800000, B2=754129740
2022-04-13	ATH	NF-PP1	Start=2/7, B1=1000000, B2=31000000
2022-03-05	Architects Cubed	NF	no factor from 2^72 to 2^73
2021-10-15	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-09-02	SRBase	NF	no factor from 2^70 to 2^71
2020-07-10	Yxinity	NF	no factor from 2^69 to 2^70
2017-10-04	ramgeis	NF	no factor from 2^68 to 2^69
2016-02-01	mikr	NF	no factor from 2^67 to 2^68
2014-06-11	Nesowa	NF	no factor from 2^66 to 2^67
2014-06-11	Nesowa	NF	no factor from 2^65 to 2^66