Prime Numbers
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Numbers
Compare 23 vs 31
Compare 23 vs 31
Compare
vs
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Property
23
31
Type
prime
prime
Unique factors
1
1
Total factors
1
1
Prime factorization
23
^{1}
31
^{1}
Prime factorization
23
31
Divisors count
2
2
Divisors
1
,
23
1
,
31
Number of properties
30
18
Additive primes
6th
Centered decagonal primes
2nd
Centered triangular primes
2nd
Chen primes
9th
11th
Class 1+ primes
7th
8th
Cousin primes
(2nd member)
4th
Emirps
3rd
Euclid primes
4th
Factorial primes
5th
Happy primes
4th
5th
Harmonic primes
4th
Isolated primes
2nd
Kynea primes
3rd
Left-truncatable primes
7th
Long primes
4th
Lucky primes
4th
Mersenne primes
3rd
Multiplicative primes
7th
Pierpont primes of the 2nd kind
7th
8th
Primes
9th
11th
Prime quintuplet 2s
(5th member)
2nd
Prime sextuplets
(6th member)
1st
Prime triplets
(3rd member)
5th
Right-truncatable primes
5th
7th
Safe primes
4th
Sexy primes
(1st member)
6th
7th
Sexy primes
(2nd member)
5th
Sexy prime quadrupletss
(4th member)
1st
Sexy prime quadrupletss
(3rd member)
2nd
Sexy prime triplets
(1st member)
5th
Sexy prime triplets
(2nd member)
4th
Sexy prime triplets
(3rd member)
3rd
Solinas primes
8th
10th
Sophie germain primes
5th
Super primes
5th
Thabit primes
4th
Twin primes
(2nd member)
5th
Two-sided primes
5th
Wedderburn-etherington primes
4th
Woodall primes
2nd
Roman numberals
XXIII
XXXI
Base 2
10111
_{2}
11111
_{2}
Base 3
212
_{3}
1011
_{3}
Base 4
113
_{4}
133
_{4}
Base 5
43
_{5}
111
_{5}
Base 6
35
_{6}
51
_{6}
Base 7
32
_{7}
43
_{7}
Base 8
27
_{8}
37
_{8}
Base 9
25
_{9}
34
_{9}
Base 10
23
_{10}
31
_{10}
Base 11
21
_{11}
29
_{11}
Base 12
1b
_{12}
27
_{12}
Base 13
1a
_{13}
25
_{13}
Base 14
19
_{14}
23
_{14}
Base 15
18
_{15}
21
_{15}
Base 16
17
_{16}
1f
_{16}
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