Prime Numbers
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Numbers
Compare 11 vs 31
Compare 11 vs 31
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vs
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Property
11
31
Type
prime
prime
Unique factors
1
1
Total factors
1
1
Prime factorization
11
^{1}
31
^{1}
Prime factorization
11
31
Divisors count
2
2
Divisors
1
,
11
1
,
31
Number of properties
36
18
Additive primes
5th
Centered decagonal primes
1st
2nd
Centered triangular primes
2nd
Chen primes
5th
11th
Class 1+ primes
5th
8th
Cousin primes
(2nd member)
2nd
Dihedral primes
3rd
Emirps
3rd
Euclid primes
4th
Good primes
2nd
Happy primes
5th
Lucas primes
4th
Lucky primes
4th
Mersenne primes
3rd
Mills primes
2nd
Multiplicative primes
7th
Palindromic primes
5th
Pierpont primes of the 2nd kind
5th
8th
Primes
5th
11th
Prime quadruplets
(1st member)
2nd
Prime quadruplets
(3rd member)
1st
Prime quintuplet 1s
(2nd member)
1st
Prime quintuplet 2s
(1st member)
2nd
Prime quintuplet 2s
(3rd member)
1st
Prime sextuplets
(2nd member)
1st
Prime triplets
(1st member)
3rd
Prime triplets
(2nd member)
2nd
Prime triplets
(3rd member)
1st
Right-truncatable primes
7th
Safe primes
3rd
Sexy primes
(1st member)
3rd
7th
Sexy primes
(2nd member)
1st
Sexy prime quadrupletss
(1st member)
2nd
Sexy prime quadrupletss
(2nd member)
1st
Sexy prime triplets
(1st member)
3rd
5th
Sexy prime triplets
(2nd member)
1st
Solinas primes
4th
10th
Sophie germain primes
4th
Super primes
3rd
5th
Thabit primes
3rd
Twin primes
(1st member)
3rd
Twin primes
(2nd member)
5th
Ulam primes
3rd
Wagstaff primes
2nd
Wedderburn-etherington primes
3rd
Roman numberals
XI
XXXI
Base 2
1011
_{2}
11111
_{2}
Base 3
102
_{3}
1011
_{3}
Base 4
23
_{4}
133
_{4}
Base 5
21
_{5}
111
_{5}
Base 6
15
_{6}
51
_{6}
Base 7
14
_{7}
43
_{7}
Base 8
13
_{8}
37
_{8}
Base 9
12
_{9}
34
_{9}
Base 10
11
_{10}
31
_{10}
Base 11
10
_{11}
29
_{11}
Base 12
b
_{12}
27
_{12}
Base 13
b
_{13}
25
_{13}
Base 14
b
_{14}
23
_{14}
Base 15
b
_{15}
21
_{15}
Base 16
b
_{16}
1f
_{16}
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