20221126, 01:56  #67  
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
3^{2}·1,117 Posts 
Quote:
I just looked at a few similar ones from UTM top (even with onedigit k values, they have "1", "k" and "0"s and there are enough permutations to kill them). Those are not good  I concur. My best find (a day or two ago), then, is still the best  (4*10^348453+41)/9 _{<348453 digits>} 444444...444449 followed by some similar ones: (5*10^343734+31)/9 _{<343734 digits>} 55555...555559 (5*10^335480+31)/9 _{<335480 digits>} 55555...555559 etc There could be a good one hiding in this list, but someone needs to run all permutations: Code:
rank prime digits who when comment 224 10^188852910^9442641 1888529 p423 Oct 2021 Nearrepdigit 269 993 · 10^1768283  1 1768286 L4879 Feb 2019 Nearrepdigit 270 9 · 10^1762063  1 1762064 L4879 Aug 2020 Nearrepdigit 283 8 · 10^1715905  1 1715906 L4879 Aug 2020 Nearrepdigit 318 9992 · 10^1567410  1 1567414 L4879 Aug 2020 Nearrepdigit 328 99 · 10^1536527  1 1536529 L4879 Feb 2019 Nearrepdigit 330 992 · 10^1533933  1 1533936 L4879 Feb 2019 Nearrepdigit 

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