is 2 4181979457 - 1
has 1258901258 decimal digits
takes 1,131,893.398 GHz-days to do one PRP test
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27929.276459.4937%----29.276459.4937%
Target292239,832.396465.2174%200000009600000000212,689.82294.2541%452,522.219366.6971%
Difference-13-239,803.1200-5.7237%-20000000-9600000000-212,689.8229-4.2541%-452,492.9429-7.2034%

Known prime factors (6 factors, 259.1 bits, 0.00000620% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4181979457250918767431134.5473
3
2012-08-20135.512e-130.00040.0008
41819794571003675069691236.54712
22 × 3
2012-08-20442.252e-120.00160.0032
418197945745416296903031342.046543
3 × 181
2019-07-1331811.811e-100.00500.0072
418197945756205803902091342.354672
25 × 3 × 7
2019-07-1332322.242e-100.01260.0256
418197945712109339715689211650.105144780
22 × 3 × 5 × 19 × 127
2019-07-13191276.148e-80.00980.0152
4181979457128950081962757911753.5181541735
5 × 13 × 23719
2019-07-1313237195.158e-70.51200.9473

57 Composite Factors:
P-1 results:
No P-1 results for M4181979457


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2019-07-1324224342.046134.10296e-112,302,63029.97
2019-07-1324224342.354138.40607e-112,302,63029.97
2019-07-1325025150.105162.56185e-8245,6955.45660e-8
TF systematically completed to 64 but no per-exponent detailed record exists
2019-07-1325325453.518172.28859e-7245,6954.87456e-7
2022-01-27ramgeisr4mg31s27127236.547120.1142,302,63029.97
2022-01-27ramgeisr4mg31s27127234.547110.1142,302,6307.493
2022-02-04ramgeisr4mg31s275276--1.830--
2022-02-08ramgeisr4mg31s27627734.547113.6602,302,6307.493
2022-02-08ramgeisr4mg31s27627742.046133.6602,302,63029.97
2022-02-08ramgeisr4mg31s27627742.354133.6602,302,63029.97
2022-04-07ramgeisr4mg31s277278--7.319--
2022-04-24ramgeisr4mg31s27827936.5471214.642,302,63029.97
2022-04-24ramgeisr4mg31s27827942.0461314.642,302,63029.97
2022-04-24ramgeisr4mg31s27827942.3541314.642,302,63029.97


ECM factoring results:
No ECM results for M4181979457


Lucas-Lehmer results:
No L-L results for M4181979457


PRP results:
No PRP results for M4181979457


P-1 factor-bounds graph:
100
101
102
100
101
102
103
104
105
TF factor-bounds graph:
279
278
277
276
272
254
251
243
this exponent TF target: 92
250
260
270
280
290
2100
Last modified: 2023-07-11T14:45:05+00:00