14-May-1995
Unsolved Problem 20:
Are there infinitely many primes of the form n^2+1?
Reference:
- [Robbins 1993]
- Neville Robbins,
Beginning Number Theory.
Wm. C. Brown Publishers. Dubuque, Iowa: 1993.
Appendix A.
Primes of the Form n^2+1
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