1 266 757 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
7600543	7	22.9	old
1176442292929	13	40.1	2008-07-15 09:57:27
1871840850264610921	19	60.7	2015-01-04 13:06:15
43104311167254259246553479	26	85.2	2018-01-05 12:42:07

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	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-05	Oliver Kruse	8740B611BF81DDA1	3	0	1	3
Verified (Factored)	2017-10-21	kkmrkkblmbrbk	8740B611BF81DDA1	3	1449	1	3
Verified	2018-01-06	vasya_nyasha	110074DF21A566DB	4	1121711	5	3
Verified	2018-01-07	Oliver Kruse	110074DF21A566DB	4	90999	5	3

P-1 factors

Date	Factor	B1	B2
2015-01-04	1871840850264610921	300000	10000000

History

Date	User	Type	Result
2018-01-07	Oliver Kruse	C-PRP	M1266757/7600543/1176442292929/1871840850264610921/43104311167254259246553479 : 110074DF21A566DB PRP: Verified PRP without proof (not generated)
2018-01-06	vasya_nyasha	C-PRP	M1266757/7600543/1176442292929/1871840850264610921/43104311167254259246553479 : 110074DF21A566DB PRP: Verified PRP without proof (not generated)
2018-01-05	TJAOI	F-ECM	Factor: 43104311167254259246553479 / (ECM curve 18, B1=50000, B2=5000000)
2017-10-21	kkmrkkblmbrbk	C-PRP	M1266757/7600543/1176442292929/1871840850264610921 : 8740B611BF81DDA1 PRP: Verified PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1266757/7600543/1176442292929/1871840850264610921 : 8740B611BF81DDA1 PRP: Verified PRP without proof (not generated)
2017-09-29	Oliver Kruse	C-PRP	M1266757/7600543/1176442292929/1871840850264610921 : 8740B611BF81DDA1 PRP without proof (not generated)
2015-01-04	alpertron	F-PM1	Factor: 1871840850264610921 / (P-1, B1=300000, B2=10000000, E=12)
2008-07-15	J Feitsma	F	Factor: 1176442292929