is 2 1493719 - 1
has 449655 decimal digits
takes 0.067 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LF6501C299B8ED015double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26719.892668.6567 %500000150000000.08354.9459 %19.976170.2069 %
Target2610.205665.5738 %60002500000.00120.9471 %0.206965.8998 %
Difference+6+19.6869+3.0829 %+494000+14750000+0.0823+3.9988%+19.7692+4.3071 %

Known prime factors (1 factor, 72.6 bits, 0.00485753% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
149371969519657390556324530792272.5582327066114528781
32 × 52321 × 4941857029
2008-04-16523214941857029640.2417.44132.570

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-09-29Team Prime Ribv4_computers20000285000--0.0022.343%
2016-03-17alpertronManual testing5000001500000012---8.672%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-11-14ANONYMOUSv4_computers212570.013
2003-07-30ANONYMOUSv4_computers212580.026


ECM factoring results:
Total ECM effort:31.262 GHz-days
Estimated T-Level:25.720
DigitsB1CompleteFacMiss
201100014.7310.000%
25500001.68218.607%
302500000.14486.584%
3510000000.01099.003%


ECM Summary

B1B2factorcurvesGHz-days
10.042
50000500000025314.09
250000400000005017.13


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-13ANONYMOUSv4_computersF6501C299B8ED0150.067


PRP results:
dateuseridcompidcofactorsres64
2017-10-01Oliver KruseGTX-1
6951965739055632453079
7CDBB9AD579DCF1B
2017-10-29kkmrkkblmbrbkold
6951965739055632453079
7CDBB9AD579DCF1B


CERT results:
No CERT results for M1493719


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 20000, B2 = 285000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
258
257
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.72 ~= 69-bit
250
260
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Last modified: 2024-03-03T02:29:32+00:00