is 2 65047613 - 1
has 19581283 decimal digits
takes 157.786 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L05746DD5BBC61E9Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual275117.635565.3333%575000104937503.92323.4085%121.558766.5149%
Target27458.816464.8649%450000140000004.17943.8621%62.995766.2218%
Difference+1+58.8191+0.4685%+125000-3506250-0.2562-0.4536%+58.5629+0.2931%

Known prime factors:
No known factors for M65047613

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-09-17Charlie_TangoWork57500010493750---3.923--3.409%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-10-31ANONYMOUSv4_computers21259--0.001--
2004-02-231997rj7v4_computers21260--0.002--
2016-03-27Mark RoseManual testing260264--0.052--
2009-11-13ANONYMOUSComputerID264265--0.057--
2009-11-16Chun sung sooJIN265266--0.115--
2010-05-28Frederick Menninger1611266267--0.230--
2010-05-29ITSMasterStation267268--0.460--
2010-05-31ITSMasterStation268269--0.919--
2012-01-16Smok_bmvbmv_q_home269270--1.838--
2012-06-15ANONYMOUS270271--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 M65047613


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2014-04-20Rick09605746DD5BBC61E9E157.8
2022-11-27Ryan PropperManual testing05746DD5BBC61E9E157.8


PRP results:
No PRP results for M65047613


P-1 factor-bounds graph:
B1 = 575000, B2 = 10493750 (P-1 stage 2)
B1 = 575000 (P-1 stage 1)
104
105
106
104
105
106
107
108
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: 67.8
250
260
270
280
Last modified: 2023-04-26T21:34:10+00:00