260 461 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

TF

No factors below 2⁶⁶

TF target 2⁴⁴

TF below 2^100 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	114000000
B2 =	4698111758340

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	503 / 1566

Estimated T-Level: 31.6 ⓘ

Status	Date	User	Residue	Shift
Verified		David Slowinski	2A68	0
Verified		Unknown	2A68	0
Verified		Brian J. Beesley	DEB30519E6DEAA68	0
Verified		Guillermo Ballester Valor	DEB30519E6DEAA68	0
Verified		Eivind Triel	DEB30519E6DEAA68	195268
Verified	2016-06-01	MadPoo	DEB30519E6DEAA68	154770

History

Date	User	Type	Result
2023-02-07	masser	NF-PP1	Start=6/5, B1=20000000, B2=620000000
2023-01-30	masser	NF-PP1	Start=130/61, B1=20000000, B2=620000000
2023-01-27	masser	NF-PP1	Start=2/7, B1=20000000, B2=620000000
2022-06-09	Sid & Andy	NF-PM1	B1=114000000, B2=4698111758340
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2020-01-02	Gordon Spence	NF	no factor from 2^65 to 2^66
2018-03-18	Gordon Spence	NF	no factor from 2^64 to 2^65
2016-07-12	Joss	NF-PM1	B1=38857104, B2=777142080, E=12
2016-06-01	MadPoo	C-LL	DEB30519E6DEAA68
2016-01-15	Joss	NF-PM1	B1=38857104, B2=388571040, E=12
2015-12-26	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-12-26	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-25	NR	NF	no factor from 2^61 to 2^62
2013-10-21	David Campeau	NF-PM1	B1=2405000, B2=81770000, E=12
2013-07-13	lycorn	NF	no factor from 2^60 to 2^61
2012-02-26	Joss	NF-PM1	B1=2376227
2011-02-11	Joss	NF-PM1	B1=2000000
2009-01-30	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-01	Sturle Sunde	NF	no factor from 2^58 to 2^59