is 2 7905803 - 1
has 2379884 decimal digits
takes 1.809 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LCE5A87575808A74Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2673.758565.6716 %400003900000.01961.7767 %3.778166.2816 %
Target2673.758565.6716 %5500060000000.12572.5620 %3.884266.5511 %
Difference----15000-5610000-0.1061-0.7853 %-0.1061-0.2696 %

Known prime factors (1 factor, 77.2 bits, 0.00097615% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
79058031703406851191426663244472477.17310773142533348141
3 × 29 × 41 × 5381 × 11069 × 50707
2012-07-2711069507074,794.30.00440.0075

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-05-25ANONYMOUSv4_computers40000390000--0.0201.777%
2012-07-27Squeeky_SquirrelT7500_22002477.1730.0330.000%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-08-09ANONYMOUSv4_computers212610.019
1998-08-16ANONYMOUSv4_computers212620.039
1998-08-24ANONYMOUSv4_computers212630.124


ECM factoring results:
No ECM results for M7905803


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-08-16ANONYMOUSv4_computersCE5A87575808A74B1.809
2002-07-14ANONYMOUSv4_computersCE5A87575808A74B1.809


PRP results:
dateuseridcompidcofactorsres64
2018-06-04Oliver KruseGTX-3
170340685119142666324447
B8B6F8AA9AF146A2
2019-11-15arnaudstm-11-010
170340685119142666324447
B8B6F8AA9AF146A2


CERT results:
No CERT results for M7905803


P-1 factor-bounds graph:
B1 = 40000, B2 = 390000 (P-1 stage 2)
B1 = 40000 (P-1 stage 1)
103
104
105
103
104
105
106
TF factor-bounds graph:
263
262
261
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