263 609 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
1326565195124787402889931929	28	90.1	2016-08-29 23:27:59

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	413 / 640

Estimated T-Level: 28.2 ⓘ

TF below 2^89 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	679A	0
Verified (Factored)		Unknown	679A	0
Verified (Factored)		Brian J. Beesley	3F4AB2758A9DE79A	0
Verified (Factored)		Eivind Triel	3F4AB2758A9DE79A	60671
Verified (Factored)	2001-10-20	Brian J. Beesley	3F4AB2758A9DE79A	140162

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-22	Oliver Kruse	C77C94472F1DF5D9	1	0	1	3
Verified	2017-10-12	Oliver Kruse	C77C94472F1DF5D9	1	126969	1	3
Verified	2017-11-06	kkmrkkblmbrbk	C77C94472F1DF5D9	1	248413	1	3
Unverified (Reliable)	2020-04-17	Oliver Kruse	2877879089401D__	1	35282	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2020-04-17	Oliver Kruse	C-PRP	M263609/1326565195124787402889931929 : 2877879089401D__ PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-11-06	kkmrkkblmbrbk	C-PRP	M263609/1326565195124787402889931929 : C77C94472F1DF5D9 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-10-12	Oliver Kruse	C-PRP	M263609/1326565195124787402889931929 : C77C94472F1DF5D9 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-09-22	Oliver Kruse	C-PRP	M263609/1326565195124787402889931929 : C77C94472F1DF5D9 PRP: Unverified (Reliable) PRP without proof (not generated)
2017-09-22	Oliver Kruse	C-PRP	M263609/1326565195124787402889931929 : C77C94472F1DF5D9 PRP without proof (not generated)
2016-08-29	WileECoyote	F-ECM	Factor: 1326565195124787402889931929 / (ECM curve 3, B1=250000, B2=25000000)
2016-07-12	Joss	NF-PM1	B1=36224496, B2=724489920, E=12
2015-12-30	Joss	NF-PM1	B1=36224496, B2=362244960, 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
2013-10-14	David Campeau	NF-PM1	B1=2475000, B2=69300000, E=12
2013-07-11	lycorn	NF	no factor from 2^60 to 2^61
2012-02-26	Joss	NF-PM1	B1=2339499
2011-02-15	Joss	NF-PM1	B1=2000000
2009-01-24	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