971 977 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
8732545533632766549679177	25	82.9	2013-10-19 05:39:22

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)		David Slowinski	96B	0
Verified (Factored)		Alex and Nick Myrman	496B	0
Verified (Factored)		The Grebelius Family	5A2F9B4AB9EFC96B	0
Verified (Factored)		Paul Victor Novarese	5A2F9B4AB9EFC96B	0

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-28	Oliver Kruse	CAB04E37BAEA67B1	1	0	1	3
Verified	2017-10-15	Oliver Kruse	CAB04E37BAEA67B1	1	588637	1	3
Verified	2017-12-24	ATH	CAB04E37BAEA67B1	1	310632	1	3
Unverified (Reliable)	2020-04-24	Oliver Kruse	50BFD2646B0A94__	1	664627	5	3

P-1 factors

Date	Factor	B1	B2
2013-10-19	8732545533632766549679177	1000000	32000000

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^58 to 2^60
2020-04-24	Oliver Kruse	C-PRP	M971977/8732545533632766549679177 : 50BFD2646B0A94__ PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-12-24	ATH	C-PRP	M971977/8732545533632766549679177 : CAB04E37BAEA67B1 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-10-15	Oliver Kruse	C-PRP	M971977/8732545533632766549679177 : CAB04E37BAEA67B1 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-09-28	Oliver Kruse	C-PRP	M971977/8732545533632766549679177 : CAB04E37BAEA67B1 PRP: Unverified (Reliable) PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=200000, B2=5000000, E=6
2013-10-19	David Campeau	F-PM1	Factor: 8732545533632766549679177
2012-06-26	Joss	NF-PM1	B1=972029
2012-01-27	Joss	NF-PM1	B1=689390
2011-06-19	Joss	NF-PM1	B1=400000
2011-06-02	Joss	NF-PM1	B1=200000
2010-05-15	Architects Cubed	NF	no factor from 2^60 to 2^61