is 2 1773587 - 1
has 533903 decimal digits
takes 0.096 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L44406BD5B041B683double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.753668.6567%500000150000000.10155.0495%16.855070.2394%1.5827%
PrimeNet2570.010863.1579%80001400000.00122.8096%0.012064.1930%1.0351%
GPU722610.173265.5738%80001200000.00111.4550%0.174366.0747%0.5009%
Difference+6+16.5804+3.0829%+492000+14880000+0.1004+3.5945%+16.6807+4.1647%+4.1647%

Known prime factors (1 factor, 74.8 bits, 0.00421542% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1773587320817784308724858172892374.7649044320473388812
22 × 3 × 29 × 25989426647669
2014-02-1729259894266476692,442.9111,384208,035

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:38:00Carsten Kossendeyleela950001615000---0.014--2.433%
2016-03-16T12:31:33alpertronManual testing5000001500000012---0.101--5.049%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-25T00:00:00ANONYMOUSv4_computers21258--0.022--
2010-04-21T13:12:00Architects Cubedm1_tt260261--0.087--
2010-12-13T03:32:00GrunwalderGIMPManual testing21263--0.900--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.070 GHz-days
Estimated T-Level:24.429
DigitsB1CurvesCompleteFacMiss
2011000248 / 1002.4808.270%
2550000248 / 2800.88641.177%

New Calculation Method

Total ECM effort:17.070 GHz-days
Estimated T-Level:24.429
DigitsB1CompleteFacMiss
20110008.0000.034%
25500000.72348.528%
302500000.04595.645%
3510000000.00299.796%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000024817.07


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-27T00:00:00ANONYMOUSv4_computers44406BD5B041B6830.096


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T16:42:00Oliver KruseDoppelherz
32081778430872485817289
41EA291C4E214C__no
2017-11-04T09:43:39ATHec2-1xf
32081778430872485817289
41EA291C4E214C__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 95000, B2 = 1615000 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-10-02T07:43:37+00:00