5 500 141 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
78103655162423859439	20	66.1	2011-01-07 12:38:28

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.

Status	Date	User	Residue	Shift
Verified (Factored)		Robert J.McWhinnie	F0DBD718CA1582A3	0
Verified (Factored)		Robert McWhinnie	F0DBD718CA1582A3	0
Verified (Factored)	2000-08-01	Andrew China	F0DBD718CA1582A3	4252882

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-12-04	kkmrkkblmbrbk	6AC8CF166D36FD35	1	2658638	5	3
Verified	2018-07-01	Dt12	6AC8CF166D36FD35	1	2301060	5	3

History

Date	User	Type	Result
2021-09-11	Dylan Delgado	NF-PM1	B1=2350000, B2=213850000
2018-07-01	Dt12	C-PRP	M5500141/78103655162423859439 : 6AC8CF166D36FD35 PRP: Verified PRP without proof (not generated)
2017-12-04	kkmrkkblmbrbk	C-PRP	M5500141/78103655162423859439 : 6AC8CF166D36FD35 PRP: Verified PRP without proof (not generated)
2011-01-07	sannerud.com	F-ECM	Factor: 78103655162423859439
2010-04-28	Squeeky_Squirrel	NF-PM1	B1=60000, B2=1035000, E=6
2009-03-06	abc	NF	no factor to 2^63