is 2 5304877 - 1
has 1596928 decimal digits
takes 0.838 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LE26B43212A140EFEdouble-checked
PRP6B7138381E9C87AAPRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27190.120567.6056%400000010285831710129.186112.0703%219.306671.5157%3.9101%
PrimeNet2620.115862.9032%220005000000.01103.0129%0.126864.0209%1.1177%
GPU722662.783965.1515%320006000000.01442.0267%2.798365.8578%0.7063%
Difference+5+87.3366+2.4541%+3968000+10285231710+129.1716+10.0436%+216.5082+5.6579%+3.2038%

Known prime factors (1 factor, 126.4 bits, 0.00238363% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
530487711610964898223001740182561651114433769739126.44910943670228567977862806773513424
24 × 7 × 1559 × 3643 × 35923 × 38791 × 362237 × 34083431
2022-08-08362237340834312.479e+100.50360.7942

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-08-23T18:39:00Carsten Kossendeyleela25000343750---0.010--0.789%
2010-09-07T09:03:00Squeeky_SquirrelP4_260060000990000---0.025--1.396%
2019-05-25T19:34:10KingFactoringMachine100000022500000---0.497--4.596%
2022-08-08T16:03:58Sid & AndyMagic_8_Ball40000001028583171039126.449129.21.675258.412.070%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-03-17T00:00:00ANONYMOUSv4_computers21261--0.058--
1998-06-07T00:00:00ANONYMOUSv4_computers21262--0.116--
2009-06-02T02:21:00GrunwalderGIMPManual testing262263--0.185--
2014-12-23T20:09:00VictordeHollanderManual testing263264--0.370--
2014-12-23T20:09:00VictordeHollanderManual testing264265--0.704--
2015-08-15T23:44:00snme2pm1Manual testing265266--1.409--
2016-06-11T04:44:42Gordon SpenceManual testing266267--2.817--
2018-06-19T09:09:01ramgeisManual testing267268--5.635--
2020-09-21T11:16:56TJAOIManual testing268269--11.27--
2021-12-09T10:55:22TJAOIManual testing269270--22.54--
2022-02-05T12:16:05mikrManual testing270271--45.08--


ECM factoring results:
Total ECM effort:2.161 GHz-days
Estimated T-Level:1.731
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000092.161


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-27T00:00:00ANONYMOUSv4_computersE26B43212A140EFE0.838
2000-07-25T00:00:00ANONYMOUSv4_computersE26B43212A140EFE0.838


PRP results:
dateuseridcompidcofactorsres64PRP
2022-08-10T09:26:00LordJuliusWhiteBox
116109648982230017401825616511144337697
6B7138381E9C87AAno


P-1 factor-bounds graph:
B1 = 4000000, B2 = 10285831710 (P-1 stage 2)
B1 = 4000000 (P-1 stage 1)
B1 = 1000000, B2 = 22500000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 60000, B2 = 990000 (P-1 stage 2)
B1 = 60000 (P-1 stage 1)
B1 = 25000, B2 = 343750 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
271
270
269
268
267
266
265
264
263
262
261
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2022-08-10T09:26:00+00:00