Prime Numbers
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Numbers
Compare 31 vs 79
Compare 31 vs 79
Compare
vs
Compare
Property
31
79
Type
prime
prime
Unique factors
1
1
Total factors
1
1
Prime factorization
31
1
79
1
Prime factorization
31
79
Divisors count
2
2
Divisors
1
,
31
1
,
79
Number of properties
18
13
Centered decagonal primes
2nd
Centered triangular primes
2nd
Chen primes
11th
Class 1+ primes
8th
Cousin primes
(1st member)
8th
Emirps
3rd
7th
Euclid primes
4th
Happy primes
5th
6th
Harmonic primes
8th
Isolated primes
7th
Kynea primes
4th
Lucky primes
4th
9th
Mersenne primes
3rd
Multiplicative primes
7th
Pierpont primes of the 2nd kind
8th
Primes
11th
22nd
Right-truncatable primes
7th
13th
Sexy primes
(1st member)
7th
Sexy primes
(2nd member)
14th
Sexy prime quadrupletss
(4th member)
4th
Sexy prime triplets
(1st member)
5th
Sexy prime triplets
(3rd member)
9th
Solinas primes
10th
19th
Super primes
5th
Twin primes
(2nd member)
5th
Roman numberals
XXXI
LXXIX
Base 2
11111
2
1001111
2
Base 3
1011
3
2221
3
Base 4
133
4
1033
4
Base 5
111
5
304
5
Base 6
51
6
211
6
Base 7
43
7
142
7
Base 8
37
8
117
8
Base 9
34
9
87
9
Base 10
31
10
79
10
Base 11
29
11
72
11
Base 12
27
12
67
12
Base 13
25
13
61
13
Base 14
23
14
59
14
Base 15
21
15
54
15
Base 16
1f
16
4f
16
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