977 719 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
437997010958415885919	21	68.6	2014-12-22 17:20:40

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	100 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Alex and Nick Myrman	C7E	0
Verified (Factored)		David Slowinski	1C7E	0
Verified (Factored)		Paul Victor Novarese	93C5D01AFBC41C7E	0
Verified (Factored)		Claude Barbe	93C5D01AFBC41C7E	0

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-28	Oliver Kruse	C2633342C44947E7	1	0	1	3
Verified	2017-10-15	kkmrkkblmbrbk	C2633342C44947E7	1	613169	1	3
Unverified (Reliable)	2020-04-24	Oliver Kruse	4FC3DBB880FFEE__	1	17943	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^58 to 2^60
2020-04-24	Oliver Kruse	C-PRP	M977719/437997010958415885919 : 4FC3DBB880FFEE__ PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-10-15	kkmrkkblmbrbk	C-PRP	M977719/437997010958415885919 : C2633342C44947E7 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-09-28	Oliver Kruse	C-PRP	M977719/437997010958415885919 : C2633342C44947E7 PRP: Unverified (Reliable) PRP without proof (not generated)
2014-12-22	SRJ2877	F-ECM	Factor: 437997010958415885919
2014-04-03	alpertron	NF-PM1	B1=10000000, B2=500000000, E=12
2014-02-17	lycorn	NF	no factor from 2^61 to 2^62
2013-10-13	David Campeau	NF-PM1	B1=830000, B2=24900000, E=12
2012-02-06	Joss	NF-PM1	B1=684145
2011-06-19	Joss	NF-PM1	B1=400000
2011-06-01	Joss	NF-PM1	B1=200000
2010-05-15	Architects Cubed	NF	no factor from 2^60 to 2^61