1 899 077 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
430321996826194087	18	58.6	old
346294705770395215623570463	27	88.2	2015-08-30 17:34:09

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 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)		Kenneth Forward	AFC9333220CE21D6	0
Verified (Factored)	1998-12-27	Greg Hewgill	AFC9333220CE21D6	827222

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-30	alpertron	A6B7E497C98201C1	2	0	1	3
Verified	2017-10-19	Oliver Kruse	A6B7E497C98201C1	2	1164819	1	3

P-1 factors

Date	Factor	B1	B2
2015-08-30	346294705770395215623570463	500000	15000000

History

Date	User	Type	Result
2021-03-23	Conductor	F-ECM	Factor: 430321996826194087 / (ECM curve 31, B1=50000, B2=5000000, Sigma=8780589755071751)
2017-10-19	Oliver Kruse	C-PRP	M1899077/430321996826194087/346294705770395215623570463 : A6B7E497C98201C1 PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M1899077/430321996826194087/346294705770395215623570463 : A6B7E497C98201C1 PRP: Verified PRP without proof (not generated)
2015-08-30	alpertron	F-PM1	Factor: 346294705770395215623570463 / (P-1, B1=500000, B2=15000000, E=12)