is 2 62092949 - 1
has 18691841 decimal digits
takes 145.861 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LE65BD0B51A81ED57double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27461.615164.8649 %580000107300003.85923.7620 %65.474366.1867 %
Target27461.615164.8649 %4000006500000013.35073.7225 %74.965966.1728 %
Difference---+180000-54270000-9.4916+0.0395%-9.4916+0.0139 %

Known prime factors:
No known factors for M62092949

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-05-23S485122I52058000010730000--4.1533.762%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-06-30Gordon Spencev4_computers212590.001
2004-10-18Thav4_computers212610.002
2016-02-23Mark RoseManual testing2612630.024
2008-12-28DerekDerek_Desk2632640.032
2009-08-10S00030vd132642660.181
2009-08-13Prime HunterWork42662670.241
2009-08-17Prime HunterWork42672680.481
2009-08-19Prime HunterWork42682690.963
2012-07-23Craig MeyersManual testing26927328.88
2013-05-25Jerry HallettManual testing27327430.81


ECM factoring results:
No ECM results for M62092949


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2014-08-21E ErrthumcarlisleE65BD0B51A81ED57145.9
2022-08-18TAMUC-ComputerScience751-124299E65BD0B51A81ED57145.9


PRP results:
No PRP results for M62092949


CERT results:
No CERT results for M62092949


P-1 factor-bounds graph:
B1 = 580000, B2 = 10730000 (P-1 stage 2)
B1 = 580000 (P-1 stage 1)
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105
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108
TF factor-bounds graph:
274
273
269
268
267
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264
263
261
259
this exponent TF target: 74
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00