1 214 959 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
1607809676509262323744409157737	31	100.3	2018-09-07 12:11:37
511832698428938598163967328408513076439	39	128.6	2013-11-13 23:13:29

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	104 / 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)		David Slowinski	1D37	0
Verified (Factored)		John Hocking	21E08A46C1AD1D37	0
Verified (Factored)	2002-08-10	Mark Outhier	21E08A46C1AD1D37	258558

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-29	Oliver Kruse	B768B45ECDCD9C57	1	0	1	3
Verified (Factored)	2017-10-18	Oliver Kruse	B768B45ECDCD9C57	1	25709	1	3
Verified (Factored)	2018-01-03	ATH	B768B45ECDCD9C57	1	784875	1	3
Verified	2018-09-08	ANONYMOUS	2DE10B388D0A4E62	2	666003	5	3
Verified	2018-09-11	Oliver Kruse	2DE10B388D0A4E62	2	1099012	5	3

P-1 factors

Date	Factor	B1	B2
2013-11-13	511832698428938598163967328408513076439	1205000	0

History

Date	User	Type	Result
2022-04-13	LordJulius	NF	no factor from 2^63 to 2^64
2022-04-13	LordJulius	NF	no factor from 2^62 to 2^63
2022-04-13	LordJulius	NF	no factor from 2^61 to 2^62
2022-04-13	LordJulius	NF	no factor from 2^1 to 2^61
2022-03-07	LordJulius	NF	no factor from 2^58 to 2^60
2018-09-11	Oliver Kruse	C-PRP	M1214959/511832698428938598163967328408513076439/1607809676509262323744409157737 : 2DE10B388D0A4E62 PRP: Verified PRP without proof (not generated)
2018-09-08	ANONYMOUS	C-PRP	M1214959/1607809676509262323744409157737/511832698428938598163967328408513076439 : 2DE10B388D0A4E62 PRP: Verified PRP without proof (not generated)
2018-09-07	TJAOI	F-ECM	Factor: 1607809676509262323744409157737 / (ECM curve 69, B1=50000, B2=5000000)
2018-01-03	ATH	C-PRP	M1214959/511832698428938598163967328408513076439 : B768B45ECDCD9C57 PRP: Verified PRP without proof (not generated)
2017-10-18	Oliver Kruse	C-PRP	M1214959/511832698428938598163967328408513076439 : B768B45ECDCD9C57 PRP: Verified PRP without proof (not generated)
2017-09-29	Oliver Kruse	C-PRP	M1214959/511832698428938598163967328408513076439 : B768B45ECDCD9C57 PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=300000, B2=10000000, E=12
2013-11-13	David Campeau	F-PM1	Factor: 511832698428938598163967328408513076439
2012-10-11	dbaugh	NF	no factor from 2^62 to 2^63
2011-05-09	Xyzzy	NF	no factor from 2^61 to 2^62
2009-02-15	Sturle Sunde	NF	no factor from 2^60 to 2^61