20 990 471 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
1074748297229288444012717983	28	89.8	2015-03-19 17:12:25

Status	Date	User	Residue	Shift
Verified (Factored)	2004-03-16	C. Cooper / S. Boone	F150466829AF467C	5117783
Verified (Factored)	2008-09-16	Heinz Horstmann	F150466829AF467C	19125305

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-03-09	riccardo uberti	D694D1A8D7C7DA0C	1	16015128	5	3
Verified	2020-06-15	Jaytholomew	D694D1A8D7C7DA0C	1	9973272	5	3

P-1 factors

Date	Factor	B1	B2
2015-03-19	1074748297229288444012717983	450000	9500000

History

Date	User	Type	Result
2022-04-11	LordJulius	NF	no factor from 2^67 to 2^68
2022-04-11	LordJulius	NF	no factor from 2^66 to 2^67
2020-06-15	Jaytholomew	C-PRP	M20990471/1074748297229288444012717983 : D694D1A8D7C7DA0C PRP: Verified PRP without proof (not generated)
2020-03-09	riccardo uberti	C-PRP	M20990471/1074748297229288444012717983 : D694D1A8D7C7DA0C PRP: Verified PRP without proof (not generated)
2015-03-19	riccardo uberti	F-PM1	Factor: 1074748297229288444012717983 / (P-1, B1=450000, B2=9500000, E=12)