is 2 78037501 - 1
has 23491629 decimal digits
takes 243.515 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L15627675DF1405B7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27598.054264.0000 %655000131000006.03163.7107 %104.085965.3358 %
Target27598.054264.0000 %5000008500000023.09323.7711 %121.147465.3576 %
Difference---+155000-71900000-17.0616-0.0604 %-17.0616-0.0217 %

Known prime factors (1 factor, 91.0 bits, 0.00011657% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7803750124200913108440239988526708232890.96715505950855884172911
37 × 541 × 1103 × 612791 × 1146071
2017-02-1061279111460714,013,6132.90425.6429

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2014-09-28coolcatmaster8895000895000--4.0501.769%
2017-02-10James Heinrich3930K655000131000001222890.9675.4503.711%


Trial Factoring results:
57585960616263646566676869707172737475
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2002-01-15Jossv4_computers212570.000
2004-03-01AxelFoxv4_computers212620.004
2004-06-12AxelFoxv4_computers212640.025
2016-04-04Mark RoseManual testing264265
2010-10-21Eugene ThorneHome2652660.096
2010-12-22S00030vd062662670.192
2011-03-01TeraTismphenom2672680.383
2011-03-04sannerud.comstrs-w2k8h2682690.766
2011-03-07sannerud.comstrs-w2k8h2692701.532
2013-01-08SMoffatManual testing2702713.064
2013-10-23snme2pm1Manual testing2712726.129
2014-02-04snme2pm1Manual testing27227312.26
2014-02-22snme2pm1Manual testing27327424.51
2016-06-14monstManual testing27427549.03


ECM factoring results:
No ECM results for M78037501


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-12-05coolcatmaster815627675DF1405B7243.5


PRP results:
No PRP results for M78037501


CERT results:
No CERT results for M78037501


P-1 factor-bounds graph:
B1 = 655000, B2 = 13100000 (P-1 stage 2)
B1 = 895000 (P-1 stage 1)
B1 = 655000 (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
262
257
this exponent TF target: 75
TF double-checked to: 67
250
260
270
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290
2100
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Last modified: 2024-03-13T02:15:48+00:00