is 2 1745143 - 1
has 525341 decimal digits
takes 0.095 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.026668.6567%500000150000000.10155.0397%17.128170.2363%1.5796%
PrimeNet2570.011063.1579%80001400000.00122.8010%0.012264.1898%1.0319%
GPU722610.176065.5738%80001100000.00111.4118%0.177166.0598%0.4860%
Difference+6+16.8506+3.0829%+492000+14890000+0.1004+3.6278%+16.9510+4.1765%+4.1765%

Known prime factors (3 factors, 145.7 bits, 0.00835082% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
174514312983863931030.274372
22 × 3 × 31
-4318.857e-114.304e-76.404e-7
174514320826955396331340.922596712
23 × 3 × 232 × 47
2008-07-155295299.723e-84.161e-58.469e-5
1745143274274974779983528409672374.5387858237828647381
3 × 7 × 158527 × 2360492543
2020-06-1915852723604925432,202.310.12818.895

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
174514327041435494212794137692271.196
17451433561148951947487820512444576203132104.812
17451435712312666072252601480290469454511135115.460
17451437416789038189765532620860803227319344707462344145.734
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:34:54alpertronManual testing5000001500000012-
skipped known factor: 1298386393
skipped known factor: 2082695539633
--0.101--5.040%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-07-15T07:46:00J FeitsmaManual testing??40.922131.32985e-80.2032.85711e-8


ECM factoring results:

Old Calculation Method

Total ECM effort:18.345 GHz-days
Estimated T-Level:24.768
DigitsB1CurvesCompleteFacMiss
2011000267 / 1002.6706.833%
2550000267 / 2800.95438.471%

New Calculation Method

Total ECM effort:18.345 GHz-days
Estimated T-Level:24.768
DigitsB1CompleteFacMiss
20110008.6130.018%
25500000.77845.913%
302500000.04895.320%
3510000000.00299.781%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025117.25
500005000000161.099


Lucas-Lehmer results:
No L-L results for M1745143


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:15:47alpertronManual testing
1298386393
2082695539633
B6CA9981C5C1F4__no
2017-10-19T15:41:14Oliver KruseThreadripper
1298386393
2082695539633
B6CA9981C5C1F4__no
2020-06-21T12:02:43fre_gamesgpu
1298386393
2082695539633
27427497477998352840967
377B9F2991DB2013no
2020-06-23T00:18:00Luigi Morelli9800X
1298386393
2082695539633
27427497477998352840967
377B9F2991DB2013no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
2
230
240
250
260
270
280
290
2100
Last modified: 2020-06-29T11:37:08+00:00