Prime Numbers
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Numbers
Compare 2 vs 61
Compare 2 vs 61
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vs
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Property
2
61
Type
prime
prime
Unique factors
1
1
Total factors
1
1
Prime factorization
2
^{1}
61
^{1}
Prime factorization
2
61
Divisors count
2
2
Divisors
1
,
2
1
,
61
Number of properties
26
12
Additive primes
1st
11th
Bell primes
1st
Centered decagonal primes
3rd
Centered square primes
4th
Chen primes
1st
Class 1+ primes
1st
Cuban primes 1
4th
Dihedral primes
1st
Euclid primes
1st
Factorial primes
1st
Fibonacci primes
1st
Isolated primes
1st
Kynea primes
1st
Left-truncatable primes
1st
Long primes
8th
Lucas primes
1st
Mills primes
1st
Multiplicative primes
1st
Palindromic primes
1st
Pierpont primes
1st
Pierpont primes of the 2nd kind
1st
Primes
1st
18th
Pythagorean primes
8th
Quartan primes
1st
Restricted left-truncatable primes
1st
Right-truncatable primes
1st
Sexy primes
(1st member)
12th
Sexy prime quadrupletss
(1st member)
4th
Sexy prime triplets
(1st member)
8th
Solinas primes
15th
Sophie germain primes
1st
Thabit primes
1st
Twin primes
(2nd member)
7th
Two-sided primes
1st
Ulam primes
1st
Wedderburn-etherington primes
1st
Roman numberals
II
LXI
Base 2
10
_{2}
111101
_{2}
Base 3
2
_{3}
2021
_{3}
Base 4
2
_{4}
331
_{4}
Base 5
2
_{5}
221
_{5}
Base 6
2
_{6}
141
_{6}
Base 7
2
_{7}
115
_{7}
Base 8
2
_{8}
75
_{8}
Base 9
2
_{9}
67
_{9}
Base 10
2
_{10}
61
_{10}
Base 11
2
_{11}
56
_{11}
Base 12
2
_{12}
51
_{12}
Base 13
2
_{13}
49
_{13}
Base 14
2
_{14}
45
_{14}
Base 15
2
_{15}
41
_{15}
Base 16
2
_{16}
3d
_{16}
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