1 481 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 6 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
71089	5	16.1	old
3915278233	10	31.9	old
12787706913743	14	43.5	old
3993419580376129303010329	25	81.7	old
8268138870080189511875976090034105337	37	122.6	old
8348981870260729786758008817506660899281935231	46	152.5	2011-12-13 19:36:06

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	16550 / 16550
55	110000000	40830 / 40830
60	260000000	98820 / 105362

Estimated T-Level: 59.7 ⓘ

TF below 2^193 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	8148B4A073E5917F	6	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	8148B4A073E5917F	6	0	1	3
Verified	2017-12-07	ATH	8148B4A073E5917F	6	1194	1	3
Verified	2020-04-17	Oliver Kruse	E381D48E7D74287D	6	997	5	3
Verified	2020-08-12	_p95holder_	E381D48E7D74287D	6	764	5	3

History

Date	User	Type	Result
2021-07-20	ViliamF	NF-PP1	Start=2/7, B1=1000000000, B2=221000000000
2021-03-27	nordi	NF-PM1	B1=1000000000000, B2=2232843418649129478
2020-08-12	_p95holder_	C-PRP	M1481/71089/3915278233/12787706913743/3993419580376129303010329/8268138870080189511875976090034105337/8348981870260729786758008817506660899281935231 : E381D48E7D74287D PRP: Verified PRP without proof (small exponent)
2020-04-17	Oliver Kruse	C-PRP	M1481/71089/3915278233/12787706913743/3993419580376129303010329/8268138870080189511875976090034105337/8348981870260729786758008817506660899281935231 : E381D48E7D74287D PRP: Verified PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M1481/71089/3915278233/12787706913743/3993419580376129303010329/8268138870080189511875976090034105337/8348981870260729786758008817506660899281935231 : 8148B4A073E5917F PRP: Verified PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M1481/71089/3915278233/12787706913743/3993419580376129303010329/8268138870080189511875976090034105337/8348981870260729786758008817506660899281935231 : 8148B4A073E5917F PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M1481/known_factors : 8148B4A073E5917F PRP without proof (not generated)
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=1000000000, B2=100000000000, E=12
2011-12-13	Michael Kenn	F-ECM	Factor: 8348981870260729786758008817506660899281935231