is 2 65047649 - 1
has 19581294 decimal digits
takes 157.786 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L4A147819C8E57295double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual275117.635465.3333%10900001057582890206.28947.6572%323.924867.9878%
Target27458.816464.8649%450000140000004.17943.8621%62.995766.2218%
Difference+1+58.8191+0.4685%+640000+1043582890+202.1100+3.7950%+260.9291+1.7660%

Known prime factors (1 factor, 77.7 bits, 0.00011950% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
650476492510972925666153146176072477.7331930102751035747
653 × 3463 × 853522073		2022-11-283463853522073868.48163.57305.49

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-09-16Charlie_TangoHome57500010062500---3.841--3.378%
2022-11-28Runtime ErrorEnfilade109000010575828902477.733206.3315.6412.67.657%
2022-11-30riccardo ubertiManual testing125000037500000---11.34--4.784%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-10-31ANONYMOUSv4_computers21259--0.001--
2004-02-231997rj7v4_computers21260--0.002--
2016-03-28Mark RoseManual testing260264--0.052--
2009-11-14ANONYMOUSComputerID264265--0.057--
2010-05-24GrunwalderGIMPLyc-i7265266--0.115--
2010-06-09NoWhereManbbox_turion266267--0.230--
2010-06-17ANONYMOUS267268--0.460--
2010-07-30ANONYMOUS268269--0.919--
2012-01-23tmorrowpaperclip269270--1.838--
2013-03-29SMoffatManual testing270271--3.676--
2013-07-31Kyle AskineManual testing271272--7.352--
2013-07-31Kyle AskineManual testing272273--14.70--
2013-09-09ChuckManual testing273274--29.41--
2022-09-13La GüiraManual testing274275--58.82--


ECM factoring results:
No ECM results for M65047649


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2013-12-30arnaudSPR084A147819C8E57295157.8
2022-11-27Ryan PropperManual testingEC207C39101C92__157.8


PRP results:
No PRP results for M65047649


P-1 factor-bounds graph:
B1 = 1090000, B2 = 1057582890 (P-1 stage 2)
B1 = 1250000, B2 = 37500000 (P-1 stage 2)
B1 = 1250000 (P-1 stage 1)
B1 = 575000, B2 = 10062500 (P-1 stage 2)
B1 = 1090000 (P-1 stage 1)
B1 = 575000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
275
274
273
272
271
270
269
268
267
266
265
264
260
259
this exponent TF target: 74
TF double-checked to: 67.7
250
260
270
280
Last modified: 2023-03-25T13:08:14+00:00