Fibs and Primes 與 What Numbers:number theory 使用情況與統計
Fibs and primes is a free, ad-free and open source app featuring a lazy list of either the Fibonacci or Prime Number sequences. A lazy list is a list whose members aren't calculated until viewed; scroll through the list indefinitely to see the sequence until the app crashes!
The Fibonacci sequence is the set of numbers beginning with {0,1}, and the next number in the sequence is the sum of the previous two numbers. In math, this is defined as (for all Int n >= 0):
fibs 0 = 0
fibs 1 = 1
fibs n = fibs (n-1) + fibs (n-2)
Prime numbers are whole numbers greater than 1 whose only two whole factors are 1 and itself. There is no clear cut equation to derive the prime numbers, but the procedure to check whether the next whole number is prime is to see if it is divisible by any lesser prime factors.
- Apple App Store
- 免費版
- 教育
商店排名
- -
With this application, you can quickly find out what number the number corresponds to. For example, if you search for "7", the app will tell you if the number is a prime number, a palindrome number, a happy number, a harshad number, etc.
・Corresponding Number Theory
Prime number
Fibonacci number
Palindrome number
Armstrong number
Happy number
Sad number
Circular Prime Number
Perfect Square
Perfect Cube
Harshad Number
Duck Number
Spy Number
Automorphic number
Strobogrammatic Number
Disarium Number
Emirp Number
・Functions
1. when you enter a number, you can immediately determine what the number theory is.
2. displays a modal with the meaning of the number theory and an example when tapped.
・Displays a modal with the meaning of the number theory and an example when tapped.
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1. Prime number
2. A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.
3. Example: 2,3,5,7...
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1. Harshad Number
2. A Harshad number is a number that is divisible by the sum of its digits.
3. Example: 18...
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1. Armstrong number
2. An Armstrong number is a number that is equal to the sum of cubes of its digits.
3. Example: 153,370,371,407...
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1. Palindrome number
2. A palindrome number is a number that is the same when read forwards or backwards.
3. Example: 121,12321...
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1. Automorphic number
2. An automorphic number is a number whose square "ends" in the same digits as the number itself.
3. Example: 5, 6, 25, 76, 376, 625
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1. Emirp Number
2. An emirp number is a prime number that results in a different prime when its digits are reverse.
3. Example: 13, 17, 31, 37...
- Apple App Store
- 免費版
- 文獻參考
商店排名
- -
Fibs and Primes VS. 
What Numbers:number theory12月 19, 2024