1 920 043 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
30720689	8	24.9	old
82572705272462303593	20	66.2	2015-10-02 11:32:24
3185567887207548058780360151	28	91.4	2015-10-02 11:32:23

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	Number of known factors	Shift	Type	Base
Verified	2017-10-05	Oliver Kruse	C13A67599CE91710	3	0	1	3
Verified	2017-11-15	kkmrkkblmbrbk	C13A67599CE91710	3	1780900	1	3

P-1 factors

Date	Factor	B1	B2
2015-10-02	3185567887207548058780360151	500000	15000000
2015-10-02	82572705272462303593	500000	15000000

History

Date	User	Type	Result
2017-11-15	kkmrkkblmbrbk	C-PRP	M1920043/30720689/82572705272462303593/3185567887207548058780360151 : C13A67599CE91710 PRP: Verified PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1920043/30720689/3185567887207548058780360151/82572705272462303593 : C13A67599CE91710 PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1920043/30720689/3185567887207548058780360151/82572705272462303593 : C13A67599CE91710 PRP without proof (not generated)
2015-10-02	alpertron	F-PM1	Factor: 263040958275809304431447878734830751767641322543 / (P-1, B1=500000, B2=15000000, E=12)