124 471 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 2⁶⁸

TF target 2⁴⁴

TF below 2^115 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	10000000000
B2 =	756670016752650

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	1119 / 4588

Estimated T-Level: 36.2 ⓘ

Status	Date	User	Residue	Shift
Verified		Unknown	044A	0
Verified		Stefan Hünicke	8D89A3751586044A	0
Verified		Brian J. Beesley	8D89A3751586044A	0
Verified		Eivind Triel	8D89A3751586044A	63390
Verified	2016-06-01	MadPoo	8D89A3751586044A	48565

Assigned

Assigned	User	Work Type	Stage	% Done	Updated	Expired
2025-08-07	-Anonymous-	factor ECM small		0.00 %	2025-08-07
2025-05-06	-Anonymous-	factor ECM small	C1S2	0.00 %	2025-10-04

History

Date	User	Type	Result
2023-08-10	Oliver Kruse	NF-PM1	B1=10000000000, B2=756670016752650
2023-05-04	masser	NF-PP1	Start=6/5, B1=50000000, B2=3050000000
2023-04-28	masser	NF-PP1	Start=185/17, B1=50000000, B2=2550000000
2023-04-23	masser	NF-PP1	Start=2/7, B1=50000000, B2=4050000000
2022-05-09	404_factor_not_found	NF	no factor from 2^67 to 2^68
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2021-12-06	Luminescence	NF-PM1	B1=200000000, B2=5825141171850
2020-02-09	Gordon Spence	NF	no factor from 2^66 to 2^67
2019-07-08	Yxinity	NF	no factor from 2^65 to 2^66
2018-05-10	chuenkit	NF	no factor from 2^64 to 2^65
2016-06-01	MadPoo	C-LL	8D89A3751586044A
2016-02-23	Gordon Spence	NF	no factor from 2^63 to 2^64
2016-02-23	Gordon Spence	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^57 to 2^58
2015-08-13	NR	NF	no factor from 2^61 to 2^62
2013-10-04	Sid & Andy	NF	no factor from 2^60 to 2^61
2013-02-21	alpertron	NF-PM1	B1=100000000, B2=2000000000, E=12
2009-02-01	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-12-31	Sturle Sunde	NF	no factor from 2^58 to 2^59