1 169 873 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
39452878003262108753	20	65.1	2011-11-26 21:38:18

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)		Bill Shepherd	75FC9B55D17099DE	0
Verified (Factored)		Simon Burge	75FC9B55D17099DE	0
Verified (Factored)	2004-11-03	Brian J. Beesley	75FC9B55D17099DE	399857

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-29	Oliver Kruse	BD88D87D26A2914A	1	0	1	3
Verified	2017-10-17	Oliver Kruse	BD88D87D26A2914A	1	751367	1	3
Verified	2018-01-06	ATH	BD88D87D26A2914A	1	18513	1	3

History

Date	User	Type	Result
2022-04-12	LordJulius	NF	no factor from 2^63 to 2^64
2022-04-12	LordJulius	NF	no factor from 2^62 to 2^63
2022-04-12	LordJulius	NF	no factor from 2^61 to 2^62
2022-04-12	LordJulius	NF	no factor from 2^1 to 2^61
2022-03-07	LordJulius	NF	no factor from 2^58 to 2^60
2018-01-06	ATH	C-PRP	M1169873/39452878003262108753 : BD88D87D26A2914A PRP: Verified PRP without proof (not generated)
2017-10-17	Oliver Kruse	C-PRP	M1169873/39452878003262108753 : BD88D87D26A2914A PRP: Verified PRP without proof (not generated)
2017-09-29	Oliver Kruse	C-PRP	M1169873/39452878003262108753 : BD88D87D26A2914A PRP: Verified PRP without proof (not generated)
2011-11-26	Andriy Makukha	F-ECM	Factor: 39452878003262108753
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61