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From: Paul Rubin <no.email@nospam.invalid>
Newsgroups: comp.lang.ada
Subject: Re: Prime sieve
Date: Wed, 27 May 2015 07:58:18 -0700
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montgrimpulo <aghte@hotlinemail.com> writes:
> The program above stops normally long before Limit (2580976). Which internal 
> restrictions do apply (GNAT, GPS 4.9.1) ?

>From the prime number theorem there are around 175k primes less than
2580976.  If that program does what it looks like, I suspect you're
running out of tasks, which in Gnat are implemented with posix threads.
Try putting an error check in Get_New_Sieve.