is 2 3250421 - 1
has 978475 decimal digits
takes 0.277 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
Actual26818.337667.6471 %10834732267496001.65108.2881 %19.988670.3285 %
Target2641.095065.6250 %1600014000000.01131.6549 %1.106366.1939 %
Difference+4+17.2426+2.0221 %+1067473+225349600+1.6398+6.6333%+18.8823+4.1346 %

Known prime factors (1 factor, 52.7 bits, 0.00162087% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
325042172410823731793291652.6851113868384
25 × 109 × 319343
-1093193430.00020.00220.0040

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2020-12-25JossManual testing108347108347---1.568%
2021-01-16JossManual testing32504232504216
skipped known factor: 7241082373179329
---5.125%
2022-01-24JossManual testing1083473119912100
skipped known factor: 7241082373179329
--1.15110.558%
2022-09-07JossManual testing1083473226749600
skipped known factor: 7241082373179329
--2.03711.439%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2021-07-10JossManual testing267268


ECM factoring results:
Total ECM effort:0.353 GHz-days
Estimated T-Level:0.577
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.353


Lucas-Lehmer results:
No L-L results for M3250421


PRP results:
dateuseridcompidcofactorsres64
2017-11-02Oliver KruseGTX-1
7241082373179329
836F00C539AB644D
2017-12-13kkmrkkblmbrbkc4.xlarge
7241082373179329
836F00C539AB644D


CERT results:
No CERT results for M3250421


P-1 factor-bounds graph:
B1 = 1083473, B2 = 226749600 (P-1 stage 2)
B1 = 1083473, B2 = 119912100 (P-1 stage 2)
B1 = 1083473 (P-1 stage 1)
B1 = 325042, B2 = 3250421 (P-1 stage 2)
B1 = 325042 (P-1 stage 1)
B1 = 108347 (P-1 stage 1)
101
102
103
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105
106
107
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
268
this exponent TF target: 64
TF double-checked to: 67
ECM T-Level=0.58 ~= -15-bit
250
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Last modified: 2024-03-13T02:15:48+00:00