2 267 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 2⁶⁶

TF target 2⁴⁴

TF below 2^205 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	6000000000000
B2 =	9223372036854775807

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	16550 / 16550
55	110000000	40830 / 40830
60	260000000	105362 / 105362
65	800000000	129547 / 194238

Estimated T-Level: 63.3 ⓘ

Status	Date	User	Residue	Shift
Verified		Unknown	763B	0
Verified		George Woltman	32C3D9D29314763B	0
Verified		Brian J. Beesley	32C3D9D29314763B	0
Verified	2015-04-11	MadPoo	32C3D9D29314763B	2142

Assigned

Assigned	User	Work Type	Stage	% Done	Updated	Expired
2024-01-13	MannImMond	factor P-1 small	S1	27.73 %	2024-12-18

History

Date	User	Type	Result
2024-10-18	-Anonymous-	NF-PM1	B1=6000000000000, B2=14001161951512335600
2023-08-09	masser	NF-PP1	Start=6/5, B1=4400000000, B2=787600000000
2023-07-16	masser	NF-PP1	Start=124/23, B1=4400000000, B2=176000000000
2023-06-29	masser	NF-PM1	B1=216000000000, B2=486755758363664790
2023-03-11	musava_ribica	NF-PM1	B1=7777777777, B2=175589738374050
2022-04-11	Anton Repko	NF	no factor from 2^64 to 2^66
2021-05-12	ATH	NF-PP1	Start=2/7, B1=1000000000, B2=241000000000
2020-12-30	Ruslan Borisov	NF	no factor from 2^64 to 2^65
2017-10-01	snme2pm1	NF	no factor from 2^63 to 2^64
2017-05-18	James Hintz	NF-PM1	B1=3110843330147, B2=248867466411760, E=12
2016-06-20	snme2pm1	NF	no factor from 2^62 to 2^63
2015-07-09	MadPoo	NF-PM1	B1=1679699495213, B2=10000000000000, E=12
2015-06-22	trebor	NF-PM1	B1=100000000000, B2=10000000000000, E=12
2015-05-04	snme2pm1	NF	no factor from 2^61 to 2^62
2015-04-11	MadPoo	C-LL	32C3D9D29314763B
2013-04-06	Le Comte	NF-PM1	B1=100000000000
2012-04-16	bcp19	NF	no factor from 2^60 to 2^61
2010-12-17	monst	NF	no factor from 2^59 to 2^60
2008-12-24	Matthias Wurtinger	NF-PM1	B1=20000000000, B2=2000000000000, E=12