15 773 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
344578472209	12	38.3	old
87479046012751507799	20	66.2	2008-08-29 02:24:37
16167602672354080122426343490363228993	38	123.6	2017-03-07 01:02:12
17579521249732269431622694421369772823	38	123.7	2017-10-04 21:03:43

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	1392 / 4588

Estimated T-Level: 36.5 ⓘ

TF below 2^116 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-21	Oliver Kruse	FCB7DDC9695EA8FA	3	0	1	3
Verified (Factored)	2017-10-02	kkmrkkblmbrbk	FCB7DDC9695EA8FA	3	0	1	3
Verified	2017-10-05	Oliver Kruse	42854A9578475198	4	0	1	3
Verified	2017-10-09	Chang Chia-Tche	42854A9578475198	4	0	1	3
Verified	2017-10-14	kkmrkkblmbrbk	42854A9578475198	4	9868	1	3
Unverified	2020-04-17	Oliver Kruse	068CAAD1A1EEB2__	4	11949	5	3

P-1 factors

Date	Factor	B1	B2
2017-03-07	16167602672354080122426343490363228993	10000000000	102860486826930

History

Date	User	Type	Result
2020-04-17	Oliver Kruse	C-PRP	M15773/344578472209/87479046012751507799/16167602672354080122426343490363228993/17579521249732269431622694421369772823 : 068CAAD1A1EEB2__ PRP without proof (small exponent)
2017-10-14	kkmrkkblmbrbk	C-PRP	M15773/344578472209/87479046012751507799/16167602672354080122426343490363228993/17579521249732269431622694421369772823 : 42854A9578475198 PRP without proof (small exponent)
2017-10-09	Chang Chia-Tche	C-PRP	M15773/known_factors : 42854A9578475198 PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M15773/344578472209/87479046012751507799/16167602672354080122426343490363228993/17579521249732269431622694421369772823 : 42854A9578475198 PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M15773/344578472209/87479046012751507799/16167602672354080122426343490363228993/17579521249732269431622694421369772823 : 42854A9578475198 PRP without proof (not generated)
2017-10-04	Oliver Kruse	F-ECM	Factor: 17579521249732269431622694421369772823 / (ECM curve 1, B1=1000000, B2=100000000)
2017-10-02	kkmrkkblmbrbk	C-PRP	M15773/344578472209/87479046012751507799/16167602672354080122426343490363228993 : FCB7DDC9695EA8FA PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M15773/344578472209/87479046012751507799/16167602672354080122426343490363228993 : FCB7DDC9695EA8FA PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M15773/344578472209/87479046012751507799/16167602672354080122426343490363228993 : FCB7DDC9695EA8FA PRP without proof (not generated)
2017-03-07	kkmrkkblmbrbk	F-PM1	Factor: 16167602672354080122426343490363228993 / (P-1, B1=10000000000, B2=102860486826930)
2008-08-29	-Anonymous-	F-ECM	Factor: 87479046012751507799