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/* This D source file is a multiple threaded implementation to perform an | |
* extremely fast Segmented Sieve of Zakiya (SSoZ) to find Twin Primes <= N. | |
* | |
* Inputs are single values N, or ranges N1 and N2, of 64-bits, 0 -- 2^64 - 1. | |
* Output is the number of twin primes <= N, or in range N1 to N2; the last | |
* twin prime value for the range; and the total time of execution. | |
* | |
* Code originally developed on a System76 laptop with an Intel I7 6700HQ cpu, | |
* 2.6-3.5 GHz clock, with 8 threads, and 16GB of memory. Parameter tuning | |
* would be needed to optimize for other hadware systems (ARM, PowerPC, etc). |