Assertion: prime number's divisor | /r/HasProperty | − 1
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Source sentences:
text: If b is odd, the primes of period n are exactly, if n = 1, the prime divisors of R 1 ( b ) = b − 1 {\displaystyle R_{1}(b)=b-1} , or, if n > 1, the odd prime divisors of R n (b).