is 2 62443247 - 1
has 18797291 decimal digits
takes 146.684 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27330.633364.3836 %----30.633364.3836 %
Target27461.269564.8649 %4000006500000013.35073.7252 %74.620266.1737 %
Difference-1-30.6362-0.4813 %-400000-65000000-13.3507-3.7252 %-43.9869-1.7901 %

Known prime factors (1 factor, 77.7 bits, 0.00012448% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
624432472501876400885812825584072477.7272003320231638349
13 × 367 × 175757 × 2389067
2013-04-071757572389067597.231.00941.2184

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2013-04-07HBendtzHAL90072477.7274.1800.000%


Trial Factoring results:
575859606162636465666768697071727374
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-07-06Gordon Spencev4_computers212590.001
2022-03-30LordJuliusManual testing21263
2008-12-25DerekDerek_Desk2632640.031
2009-08-14Lt.Cmdr.Databrenner2642650.060
2009-08-15Sturle Sundeklengel.ifi2652660.120
2009-08-23SMoffatRuth2662670.239
2009-08-26Lukin DmitryDmitry2672680.479
2009-08-30Lukin DmitryDmitry2682690.957
2012-01-09Trex2692701.915
2013-03-03Carsten KossendeyManual testing2702713.830
2013-04-03BdotManual testing27127322.98


ECM factoring results:
No ECM results for M62443247


Lucas-Lehmer results:
No L-L results for M62443247


PRP results:
No PRP results for M62443247


CERT results:
No CERT results for M62443247


P-1 factor-bounds graph:
104
105
106
104
105
106
107
TF factor-bounds graph:
273
271
270
269
268
267
266
265
264
263
259
this exponent TF target: 74
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00