296 557 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
1295569169434409217774613690068123839	37	120.0	2012-08-16 13:06:42

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	448 / 640

Estimated T-Level: 28.5 ⓘ

TF below 2^90 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	3538	0
Verified (Factored)		Unknown	3538	0
Verified (Factored)		Guillermo Ballester Valor	8E8C3C9161B53538	0
Verified (Factored)		Eivind Triel	8E8C3C9161B53538	78473
Verified (Factored)	2001-11-24	Eugene Gogol'	8E8C3C9161B53538	221633

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-22	Oliver Kruse	CAA537CC080CB050	1	0	1	3
Verified	2017-10-12	Oliver Kruse	CAA537CC080CB050	1	141965	1	3
Verified	2017-11-06	kkmrkkblmbrbk	CAA537CC080CB050	1	47498	1	3
Unverified (Reliable)	2020-04-17	Oliver Kruse	62095BF5B3D01C__	1	237920	5	3

P-1 factors

Date	Factor	B1	B2
2012-08-16	1295569169434409217774613690068123839	12000000	500000000

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2021-05-01	nordi	NF-PP1	Start=6/5, B1=10000000, B2=500000000
2021-04-23	nordi	NF-PP1	Start=2/7, B1=10000000, B2=500000000
2020-04-17	Oliver Kruse	C-PRP	M296557/1295569169434409217774613690068123839 : 62095BF5B3D01C__ PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-11-06	kkmrkkblmbrbk	C-PRP	M296557/1295569169434409217774613690068123839 : CAA537CC080CB050 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-10-12	Oliver Kruse	C-PRP	M296557/1295569169434409217774613690068123839 : CAA537CC080CB050 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-09-22	Oliver Kruse	C-PRP	M296557/1295569169434409217774613690068123839 : CAA537CC080CB050 PRP: Unverified (Reliable) PRP without proof (not generated)
2017-09-22	Oliver Kruse	C-PRP	M296557/1295569169434409217774613690068123839 : CAA537CC080CB050 PRP without proof (not generated)
2012-08-16	markr	F-PM1	Factor: 1295569169434409217774613690068123839
2011-08-01	Joss	NF-PM1	B1=1606551
2009-01-22	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-02	Sturle Sunde	NF	no factor from 2^58 to 2^59