13 100 287 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 2⁷⁴

TF target 2⁶⁸

P-1

B1 =	1000000
B2 =	2674021350

ECM

Digits	B1	Curves
25	50000	2 / 280

Estimated T-Level: 20.0 ⓘ

Status	Date	User	Residue	Shift
Verified	2002-12-09	C. Cooper / S. Boone	A4BAC0BAB8DE6465	9544261
Verified	2004-11-30	Carl Johan Hall	A4BAC0BAB8DE6465	10290265

History

Date	User	Type	Result
2022-03-11	axn	NF-PM1	B1=1000000, B2=2674021350
2022-03-04	-Anonymous-	NF	no factor from 2^73 to 2^74
2022-03-04	-Anonymous-	NF	no factor from 2^72 to 2^73
2021-10-22	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-08-30	SRBase	NF	no factor from 2^70 to 2^71
2021-08-07	SRBase	NF	no factor from 2^69 to 2^70
2019-03-30	Dylan Delgado	NF-PM1	B1=1000000, B2=30000000, E=12
2018-01-14	ramgeis	NF	no factor from 2^68 to 2^69
2017-12-23	-Anonymous-	NF	no factor from 2^67 to 2^68
2015-07-09	Nesowa	NF	no factor from 2^66 to 2^67
2014-05-26	Nesowa	NF	no factor from 2^65 to 2^66
2013-05-25	lycorn	NF	no factor from 2^64 to 2^65