is 2 1502801 - 1
has 452389 decimal digits
takes 0.067 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA682160053518BFDdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26719.772468.6567%30000002730000001.14709.3951%20.919471.6014%2.9447%
PrimeNet2570.012863.1579%65001000000.00082.3413%0.013564.0205%0.8626%
GPU722610.204465.5738%6000500000.00050.9483%0.204965.9003%0.3265%
Difference+6+19.5680+3.0829%+2994000+272950000+1.1465+8.4467%+20.7144+5.7012%+5.7012%

Known prime factors (2 factors, 120.0 bits, 0.00798255% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1502801237676087143971931754.4007907769796
22 × 37 × 173 × 308849
-1733088490.00240.00110.0020
1502801544656170505674863672065.56218121367050783
44267 × 409365149
2018-10-25442674093651497.41961.44722.6979

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1502801129451747444608812945455145365056783137119.962
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:15:32alpertronManual testing5000001500000012-
skipped known factor: 23767608714397193
--0.084--4.949%
2021-07-25T12:40:46Dylan Delgadolaptop-ryzen737003000000273000000-
skipped known factor: 23767608714397193
--1.147--9.395%


Trial Factoring results:
No TF results for M1502801


ECM factoring results:

Old Calculation Method

Total ECM effort:30.067 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000301 / 1003.0104.855%
2550000301 / 2801.07534.064%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:30.067 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.35725.749%
302500000.11389.315%
3510000000.00899.236%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024813.82
50000500000030.167
250000350000005016.08


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-23T00:00:00MadPoov4_computersA682160053518BFD0.067


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T09:58:20Oliver KruseGTX-1
23767608714397193
C0F42E1ADED34A__no
2017-10-29T09:14:41kkmrkkblmbrbkold
23767608714397193
C0F42E1ADED34A__no
2018-10-25T20:57:28rucio
23767608714397193
54465617050567486367
A6EA2ABCD1EFD9__no
2018-10-25T21:18:30ATHec2-PRPCFDC
23767608714397193
54465617050567486367
A6EA2ABCD1EFD9__no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 273000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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TF factor-bounds graph:
267
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2100
Last modified: 2022-04-21T11:50:48+00:00