is 2 407363239 - 1
has 122628555 decimal digits
takes 7,758.761 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
Actual2811,202.203064.1975 %480000010023239101,633.49406.7000 %2,835.696966.5963 %
Target2811,202.203064.1975 %2400000500000000814.99864.4028 %2,017.201665.7739 %
Difference---+2400000+502323910+818.4953+2.2971%+818.4953+0.8224 %

Known prime factors (1 factor, 81.0 bits, 0.00001989% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
40736323924600834061597454632656472581.0253019520627583857
571 × 508103 × 10407589
2019-08-26508103104075891,202.228.92829.248

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2019-08-26Krieselemu322000076475000622581.025199.24.330%
2024-01-30Krieselmayer48000001002323910
skipped known factor: 2460083406159745463265647
--1,6346.700%


Trial Factoring results:
57585960616263646566676869707172737475767778798081
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2014-06-11Carsten KossendeyManual testing2652680.128
2016-05-14ATHManual testing2682700.440
2016-05-14ATHManual testing2702710.587
2016-05-14ATHManual testing2712721.174
2016-05-14ATHManual testing2722732.348
2016-05-14ATHManual testing2732744.696
2016-05-14ATHManual testing2742759.392
2016-05-14ATHManual testing27527618.78
2016-05-14ATHManual testing27627737.57
2019-08-11KrieselManual testing27727875.14
2019-08-12KrieselManual testing278279150.3
2019-08-13KrieselManual testing279280300.6
2019-08-15KrieselManual testing280281601.1


ECM factoring results:
No ECM results for M407363239


Lucas-Lehmer results:
No L-L results for M407363239


PRP results:
No PRP results for M407363239


CERT results:
No CERT results for M407363239


P-1 factor-bounds graph:
B1 = 4800000, B2 = 1002323910 (P-1 stage 2)
B1 = 3220000, B2 = 76475000 (P-1 stage 2)
B1 = 4800000 (P-1 stage 1)
B1 = 3220000 (P-1 stage 1)
104
105
106
107
104
105
106
107
108
109
1010
TF factor-bounds graph:
281
280
279
278
277
276
275
274
273
272
271
270
268
this exponent TF target: 81
TF double-checked to: 67
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Last modified: 2024-03-13T02:15:48+00:00