is 2 7850839 - 1
has 2363339 decimal digits
takes 1.796 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L97813EE905C2ACCDdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2673.784865.6716 %350002887500.01621.5736 %3.801066.2118 %
Target2673.784865.6716 %5500060000000.12572.5592 %3.910566.5502 %
Difference----20000-5711250-0.1095-0.9855 %-0.1095-0.3383 %

Known prime factors (1 factor, 70.3 bits, 0.00089509% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
785083914258189271793950488892270.27290806786840196
22 × 32 × 7 × 73 × 69767 × 70753
2012-08-29697677075352.0340.02320.0471

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-05-18compusionv4_computers35000288750--0.0161.574%
2003-04-27compusionv4_computers35000288750--0.0161.574%
2012-08-29nextPrimealpha_2772270.2720.3320.000%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-08-16ANONYMOUSv4_computers212620.039
1999-01-02ANONYMOUSv4_computers212630.125


ECM factoring results:
No ECM results for M7850839


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-08-16ANONYMOUSv4_computers97813EE905C2ACCD1.796
2002-06-15compusionv4_computers97813EE905C2ACCD1.796
2003-04-27compusionv4_computers97813EE905C2ACCD1.796


PRP results:
dateuseridcompidcofactorsres64
2018-05-23axnL
1425818927179395048889
44F7196E6DD3EAAF
2019-10-25marssystemssystem11
1425818927179395048889
44F7196E6DD3EAAF


CERT results:
No CERT results for M7850839


P-1 factor-bounds graph:
B1 = 35000, B2 = 288750 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
103
104
105
103
104
105
106
TF factor-bounds graph:
263
262
this exponent TF target: 67
TF double-checked to: 67
250
260
270
280
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Last modified: 2024-03-13T02:15:48+00:00