See challenge here: https://sigmageek.com
Prime checker: https://www.numberempire.com/primenumbers.php
Pi digits API: https://api.pi.delivery/v1/pi?start=0&numberOfDigits=100&radix=10
First palprimes:
| digits | number | index | time (seconds) |
|---|---|---|---|
| 01 | 3 | 0 | 0 |
| 02 | 11 | 94 | 0 |
| 03 | 383 | 25 | 0 |
| 04 | - | - | - |
| 05 | 38183 | 488 | 0 |
| 06 | - | - | - |
| 07 | 9149419 | 13.901 | 0 |
| 08 | - | - | - |
| 09 | 318272813 | 129.079 | 0 |
| 10 | - | - | - |
| 11 | 74670707647 | 5.793.497 | 1 |
| 12 | - | - | - |
| 13 | 1020776770201 | 25.803.984 | 2 |
| 14 | - | - | - |
| 15 | 176860696068671 | 298.503.033 | 4 |
| 16 | - | - | - |
| 17 | 30948834143884903 | 6.604.858.609 | 70 |
| 18 | - | - | - |
| 19 | 7240428184818240427 | 72.075.707.767 | 500 |
| 20 | - | - | - |
| 21 | 151978145606541879151 | 140.672.630.233 | 6000 |
| digits | index | guess | error | error |
|---|---|---|---|---|
| 09 | 129.079 | 194.776 | +65.697 | +51% |
| 11 | 5.793.498 | 2.528.873 | -3.264.625 | -56% |
| 13 | 25.803.984 | 32.833.592 | +7.029.608 | +27% |
| 15 | 298.503.034 | 426.294.504 | +127.791.470 | +43% |
| 17 | 6.604.858.609 | 5.534.788.946 | -1.070.069.663 | -16% |
| 19 | 72.075.707.767 | 71.860.857.656 | +214.850.111 | +0.3% |
| 21 | ? | 933.004.476.480 | ? | ? |
| 21 | 880.347.462.679 | 933.004.476.480 | ? | ? |
- Download Pi_0.ycd and Pi_1.ycd
- Extract 10.000 to 100.000.020.000 digits => Pi_0_1.txt
- Run C# code for Pi_0_1.txt with lenght >= 21 | Save in output.txt
- Delete Pi_0.ycd and Pi_0_1.txt files
- Download Pi_2.ycd
- Extract 100.000.010.000 to 200.000.020.000 digits => Pi_1_2.txt
- Run C# code for Pi_1_2.txt... and repeat