parenthesesplease's definitions

163

the number after 164 and before 162.

163 is the 38th prime number.

fun fact: the closest prime number next to 163 is 167.

by parenthesesplease January 29, 2026

991

the number after 992 and before 990.

the 167th prime number, 167 is also a prime number making 991 a super prime number.

991 is also the second biggest prime number smaller than 1000. (first is 997)

fun fact: 919 is prime, 199 prime and 991 is prime too.

by parenthesesplease January 29, 2026