101, 103
107, 109
137, 139
149, 151
179, 181
191, 193
197, 199
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Prime numbers between 80 and a 100 are: 83, 89 and 97
No, 21 and 23 are not twin prime numbers. Twin primes are pairs of prime numbers that differ by 2, such as 3 and 5, or 11 and 13.
The last known twin prime number as of now is 2996863034895, which is part of the twin prime pair (2996863034895, 2996863034897). Twin prime numbers are prime numbers that differ by 2. However, it is worth noting that there may be larger twin prime numbers that have not been discovered yet.
The twin primes in this range are 59 & 61 and 71 & 73.
No - co-prime numbers are pairs of numbers which share no positive integer factors apart from 1. Twin prime numbers are a pair of prime numbers with a difference of 2.