26861
This number is a prime.
It is at p = 26861 that for the first time the primes of the form 4n + 1 (up to p) outnumber those of the form 4n + 3. (Their lead is brief, 4n + 3 primes catch up at 26863, and 4n + 1 primes do not regain the lead in this prime race until 616841.) [Leech]
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