27 819 563 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
55639127	8	25.7	old
8735342783	10	33.0	2008-09-08 23:37:33
270406152361	12	38.0	2008-09-08 23:37:33
63398672739085679	17	55.8	2015-02-16 12:48:40
70420402066028213146007	23	75.9	2022-05-21 03:33:29

ECM

Digits	B1	Curves
25	50000	1 / 280

Estimated T-Level: 20.0 ⓘ

TF below 2^61 is very unlikely to find new factors due to ECM effort.

P-1 factors

Date	Factor	B1	B2
2022-05-21	70420402066028213146007	285000	34496700

History

Date	User	Type	Result
2024-02-03	masser	NF-PP1	Start=2/7, B1=50000, B2=5000000
2023-12-12	masser	NF	Redundant composite factor (8735342783*270406152361) from 2^71 to 2^72
2022-11-01	masser	NF	no factor from 2^69 to 2^71
2022-08-10	LordJulius	NF	no factor from 2^67 to 2^68
2022-08-10	LordJulius	NF	no factor from 2^66 to 2^67
2022-08-10	LordJulius	NF	no factor from 2^65 to 2^66
2022-08-05	masser	NF	no factor from 2^67 to 2^69
2022-05-21	masser	F-PM1	Factor: 70420402066028213146007 / (P-1, B1=285000, B2=34496700)
2015-02-16	TJAOI	F	Factor: 63398672739085679 / TF: 55-56
2008-09-08	Will Edgington	F	Factor: 270406152361
2008-09-08	Will Edgington	F	Factor: 8735342783