1 777 121 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
37990619778558285815029769	26	85.0	2015-05-23 02:25:17

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)		Martin Dohmen	08594AB685F4099E	0
Verified (Factored)	1998-12-27	Anthony May	08594AB685F4099E	627190

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-03	Oliver Kruse	38CCBC3DB536F30B	1	0	1	3
Verified	2017-11-04	kkmrkkblmbrbk	38CCBC3DB536F30B	1	1733343	1	3

P-1 factors

Date	Factor	B1	B2
2015-05-23	37990619778558285815029769	2475400	86660000

History

Date	User	Type	Result
2017-11-04	kkmrkkblmbrbk	C-PRP	M1777121/37990619778558285815029769 : 38CCBC3DB536F30B PRP: Verified PRP without proof (not generated)
2017-10-03	Oliver Kruse	C-PRP	M1777121/37990619778558285815029769 : 38CCBC3DB536F30B PRP: Verified PRP without proof (not generated)
2015-05-23	mikr	F-PM1	Factor: 37990619778558285815029769 / (P-1, B1=2475400, B2=86660000, E=12)
2015-05-08	snme2pm1	NF	no factor from 2^64 to 2^65
2015-05-08	snme2pm1	NF	no factor from 2^63 to 2^64
2014-09-18	Joss	NF-PM1	B1=172234
2014-05-09	Joss	NF-PM1	B1=136117
2014-04-10	-Anonymous-	NF-PM1	B1=100000
2011-02-10	Carsten Kossendey	NF-PM1	B1=95000, B2=1615000, E=6
2010-12-13	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-20	Architects Cubed	NF	no factor from 2^60 to 2^61