is 2 1745561 - 1
has 525467 decimal digits
takes 0.095 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LBE0E3FF46C3CD455double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26717.022668.6567%2475400150000000.24845.7792%17.271070.4681%1.8114%
PrimeNet2570.011063.1579%80001400000.00122.8011%0.012264.1899%1.0320%
GPU722610.176065.5738%80001100000.00111.4119%0.177066.0598%0.4861%
Difference+6+16.8466+3.0829%+2467400+14890000+0.2473+4.3673%+17.0939+4.4083%+4.4083%

Known prime factors (1 factor, 115.4 bits, 0.00661281% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
17455615598665068478110208626212550090306335115.43116036864562390286585877584771
3 × 17 × 31 × 241 × 2719 × 15671 × 18181 × 25339 × 2144161
2015-04-192533921441611.074e+110.01110.0172

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:49:00Carsten Kossendeyleela950001543750---0.014--2.401%
2014-04-05T13:21:00Jocelyn LaroucheManual testing100000100000---0.008--0.887%
2014-05-06T10:53:00Jocelyn LaroucheManual testing136770136770---0.011--1.059%
2014-09-15T22:12:00ANONYMOUSManual testing173540173540---0.014--1.203%
2015-04-19T08:37:00mikrMSI24754001500000035115.4310.1950.1890.3895.779%
2016-03-16T12:34:56alpertronManual testing5000001500000012-
skipped known factor: 55986650684781102086262125500903063
--0.101--5.040%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-21T00:00:00ANONYMOUSv4_computers21257--0.011--
2003-02-02T00:00:00ANONYMOUSv4_computers21258--0.022--
2022-03-08T23:06:25LordJuliusManual testing258260--0.066--
2022-03-09T03:01:43LordJuliusManual testing21260--0.088--
2010-04-24T12:42:00Architects Cubedm1_fw260261--0.088--
2010-11-18T02:51:00GrunwalderGIMPManual testing21263--0.914--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.453 GHz-days
Estimated T-Level:24.536
DigitsB1CurvesCompleteFacMiss
2011000254 / 1002.5407.786%
2550000254 / 2800.90740.302%

New Calculation Method

Total ECM effort:17.453 GHz-days
Estimated T-Level:24.536
DigitsB1CompleteFacMiss
20110008.1940.028%
25500000.74147.686%
302500000.04695.542%
3510000000.00299.791%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025417.45


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-10T00:00:00ANONYMOUSv4_computersBE0E3FF46C3CD4550.095


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-03T09:47:22Oliver KruseDoppelherz
55986650684781102086262125500903063
7D4F623ADB0CF8__no
2017-11-03T17:18:00kkmrkkblmbrbkc4.xlarge
55986650684781102086262125500903063
7D4F623ADB0CF8__no


P-1 factor-bounds graph:
B1 = 2475400, B2 = 15000000 (P-1 stage 2)
B1 = 2475400 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 95000, B2 = 1543750 (P-1 stage 2)
B1 = 173540 (P-1 stage 1)
B1 = 136770 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
103
104
105
106
107
103
104
105
106
107
108
TF factor-bounds graph:
267
263
261
260
258
257
250
260
270
280
290
2100
2110
2120
Last modified: 2022-03-09T03:01:43+00:00