is 2 2460527 - 1
has 740693 decimal digits
takes 0.171 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L1EFCAE94FD96C0A6double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26824.224467.6471 %2382500857701000.69657.5418 %24.921070.0870 %
Target2630.648665.0794 %100008000000.00531.3345 %0.654065.5454 %
Difference+5+23.5758+2.5677 %+2372500+84970100+0.6912+6.2072%+24.2670+4.5416 %

Known prime factors (1 factor, 77.8 bits, 0.00316166% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24605272619356648081382152615532477.79453227553448537288
23 × 33 × 101 × 2439840183743
2021-04-03101243984018374312,44013,36924,970

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-10-14ANONYMOUSv4_computers2048204800--0.0010.659%
2003-10-31Team Prime Ribv4_computers15000232500--0.0031.692%
2010-12-22JossManual testing2000020000--0.0020.620%
2011-01-20Oscar Östlin9500019475006--0.0204.237%
2014-09-02JossManual testing121086121086--0.0121.804%
2014-10-10mikrMSI23825008577010012--0.69711.213%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-08-16ANONYMOUSv4_computers212590.016
2016-02-23Mark RoseManual testing2592600.031
2009-01-12Sturle Sundecorbusier.ifi2602610.062
2012-06-07Sebastian HornbostelManual testing2612620.125
2013-12-04Jerry HallettManual testing2622630.399
2015-03-03VictordeHollanderManual testing2632640.798
2015-03-03VictordeHollanderManual testing2642651.519
2015-10-26ramgeisManual testing2652663.037
2017-07-15Gordon SpenceManual testing2662676.074
2019-07-01TJAOIManual testing26726812.15


ECM factoring results:
Total ECM effort:11.027 GHz-days
Estimated T-Level:22.189
DigitsB1CompleteFacMiss
20110004.7310.882%
25500000.43864.550%
302500000.02897.277%
3510000000.00199.871%


ECM Summary

B1B2factorcurvesGHz-days
50000500000011810.58
50000500000050.447


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-08-07ANONYMOUSv4_computers1EFCAE94FD96C0A60.171
2018-05-26kkmrkkblmbrbkold1EFCAE94FD96C0A60.171


PRP results:
dateuseridcompidcofactorsres64
2021-04-03Kirill Frolovshodan1
261935664808138215261553
F73E80A7464214CD
2021-04-05Joe S.11600k
261935664808138215261553
F73E80A7464214CD


CERT results:
dateuseridcompid
2021-04-03garoaryabhata
2021-04-05MichaelEZwoelfer


P-1 factor-bounds graph:
B1 = 2382500, B2 = 85770100 (P-1 stage 2)
B1 = 2382500 (P-1 stage 1)
B1 = 95000, B2 = 1947500 (P-1 stage 2)
B1 = 121086 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
B1 = 15000, B2 = 232500 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
101
102
103
104
105
106
107
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
259
this exponent TF target: 63
TF double-checked to: 67
ECM T-Level=22.19 ~= 57-bit
250
260
270
280
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Last modified: 2024-02-29T14:28:04+00:00