263

Basic Information

Cardinal Number

two hundred and sixty-three

Ordinal Number

two hundred and sixty third

Roman Numeral

CCLXIII

Greek Numeral

ΣΞΓ´

Factorization

263

Different Representations

Binary Form

100000111₂

Ternary Form

100202₃

Quaternary Form

10013₄

Quinary Form

2023₅

Senary Form

1115₆

Septenary Form

524₇

Octal Form

407₈

Nonary Form

322₉

Undecimal Form

21A₁₁

Duodecimal Form

19B₁₂

Tridecimal Form

173₁₃

Quattuordecimal Form

14B₁₄

Quindecimal Form

128₁₅

Hexadecimal Form

107₁₆

Septendecimal Form

F8₁₇

Octodecimal Form

EB₁₈

Novemdecimal Form

DG₁₉

Vigesimal Form

D3₂₀

Unvigesimal Form

CB₂₁

Duovigesimal Form

BL₂₂

Trevigesimal Form

BA₂₃

Quattuorvigesimal Form

AN₂₄

Quinvigesimal Form

AD₂₅

Hexavigesimal Form

A3₂₆

Septenvigesimal Form

9K₂₇

Octovigesimal Form

9B₂₈

Novemvigesimal Form

92₂₉

Trigesimal Form

8N₃₀

Untrigesimal Form

8F₃₁

Duotrigesimal Form

87₃₂

Tretrigesimal Form

7W₃₃

Quattuortrigesimal Form

7P₃₄

Quintrigesimal Form

7I₃₅

Hexatrigesimal Form

7B₃₆

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257	263	269

263 is a 3-digit prime number. 263 has 2 factors, 1 and 263. It is the 56th prime number, and the tenth prime number from 201-300.

Proofs[]

— 263 is divisible by 1.

— 263 is not divisible by 2-262.

— 263 is divisible by 263.

Therefore, 263 is a prime number.

As an Exponent of Mersenne Number[]

2²⁶³ - 1 is divisible by 23,671, 13,572,264,529,177, etc., and is therefore not a prime number.

Relationship with other odd numbers[]

The numbers before[]

257 is the prime number preceding 263.
- The difference between 263 and 257 is 6. Therefore, they are sexy primes.
259 is a composite number. Its prime factorization is 7 × 37.
261 is a composite number. Its prime factorization is 3² × 29.

The numbers after[]

265, the odd number following 263, is a composite number. Its prime factorization is 5 × 53.
267 is a composite number. Its prime factorization is 3 × 89.
269 is the prime number following 263.
- The difference between 269 and 263 is 6. Therefore, they are sexy primes.

Trivia[]

263 is a balanced prime, since it is equal to the arithmetic mean of the two primes surrounding it.
263 is a Chen prime, since 265 = 263 + 2 is a semiprime.
263 is a safe prime, since ${\frac {263-1}{2}}=131$ ${\frac {263-1}{2}}=131$ is also prime.
- 131 is its associated Sophie Germain prime.
263 is a happy prime:
- 2² + 6² + 3² = 49
- 4² + 9² = 97
- 9² + 7² = 130
- 1² + 3² + 0² = 10
- 1² + 0² = 1

Navigation[]

Prime Numbers 1-1,000

1-100
1-25	2 • 3 • 5 • 7 • 11 • 13 • 17 • 19 • 23
26-50	29 • 31 • 37 • 41 • 43 • 47
51-75	53 • 59 • 61 • 67 • 71 • 73
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176-200	179 • 181 • 191 • 193 • 197 • 199

201-400
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351-400	353 • 359 • 367 • 373 • 379 • 383 • 389 • 397

401-600
401-450	401 • 409 • 419 • 421 • 431 • 433 • 439 • 443 • 449
450-500	457 • 461 • 463 • 467 • 479 • 487 • 491 • 499
501-550	503 • 509 • 521 • 523 • 541 • 547
551-600	557 • 563 • 569 • 571 • 577 • 587 • 593 • 599

601-800
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651-700	653 • 659 • 661 • 673 • 677 • 683 • 691
701-750	701 • 709 • 719 • 727 • 733 • 739 • 743
751-800	751 • 757 • 761 • 769 • 773 • 787 • 797

801-1,000
801-850	809 • 811 • 821 • 823 • 827 • 829 • 839
851-900	853 • 857 • 859 • 863 • 877 • 881 • 883 • 887
901-950	907 • 911 • 919 • 929 • 937 • 941 • 947
951-1000	953 • 967 • 971 • 977 • 983 • 991 • 997