Complete repository for the TI Number Theory package
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TINT Package v1.2 Info

TINT, or TI Number Theory, is a package of lists and programs designed for number theoretic computation and analysis on the TI-83+ series of calculators. These programs are designed to be used as subprograms for larger projects, and are optimized for numbers less than 10^14. TINT's main feature is the precomputation of many arithmetic properties of a given input number stored for later use (e.g. number of divisors, totient function, etc.).

To install, simply download and open the group TINT, or you may download/copy individuals programs directly. All TINT programs are denoted by θNT followed by 2 or 3 characters. The following variables and lists are defined for an input N after executing the program θNTN. Most programs also require the factorization of N to be defined via θNTN (exceptions are noted below).

Updated in v1.1

  • Removed all remainder( commands to allow support for older OS's
  • Added primality/probable prime tests (see documentation for θNTPT)
  • Added Lucas sequence generation (see documentation for θNTLS)
  • Added more numerical properties to θNTIS
  • Adjusted variable allocation for less shuffling (most inputs that are "bases" are now θ instead of Q)
  • Better edge case support
  • General bug fixes

Updated in v1.2

  • Added Zeda's fast moduler exponentian algorithm (see documentation for θNTMZ)



  • W: # of distinct prime divisors
  • O: # of prime divisors
  • C: Compositeness
  • T: # of Divisors
  • S: Sum of Divisors
  • A: Aliquot sum
  • B: Abundance
  • H: Totient
  • L: Liouville function
  • U: Mobius function
  • R: Radical
  • D: Arithmetic derivative
  • G: Log arithmetic derivative


  • N: Number
  • M: Arbitrary whole number (usually a modulus)
  • P: Arbitrary whole number (usually a prime)
  • Q: Arbitrary whole number
  • K: Input number (usually small)
  • θ: Input number (usually a base)

Program Vars

  • X: Bound
  • Y: Loop var
  • Z: Counter

Empty Vars

  • E: Empty var
  • F: Empty var
  • I: Empty var
  • J: Empty var
  • V: Empty var


  • P: Prime factors of N
  • A: Prime multiplicities of N
  • B: A+1 (useful for divisor-related queries)
  • D: Divisors of N
  • E: Divisor multiplicities of N
  • U: Unitary divisors of N (those divisors with multiplicity 1)

Premade Lists

  • P100: All primes < 100
  • P1000: All primes < 1000


Return is Ans unless otherwise stated; if a return is also stored in a variable, it is denoted in parentheses

  • NTCL: List of integers between 1 and N coprime to N --> L1; v1.1
  • NTCM: Carmichael's function of N
  • NTCQ: Ramanujan's sum of N base Q
  • NTCR: Core of N mod M
  • NTDK: Sum of Kth powers of divisors of N (K=0 <--> # of Divisors, K=1 <--> Sum of Divisors)
  • NTET: Euler's totient function of N (w/o known factorization); v1.1
  • NTFP: Find the smallest prime factor of N (w/o known factorization)
  • NTGCD: GCD of L1
  • NTIS: If N satisfies property; input the property as a two-letter string from the list below in Ans; tests may not always return 1 for a positive result
    • "CM": Carmichael
    • "LC": Lucas-Carmichael
    • "KP": K-Perfect (K=2 <--> Perfect)
    • "GI": Giuga
    • "SF": Squarefree
    • "KS": K-Smooth
    • "KR": K-Rough
    • "PW": Perfect power
    • "AB": Abundant
    • "PF": Powerful
    • "UN": Unusual
    • "RF": Refactorable
    • "SP": Semiprime
    • "NH": Nonhypotenuse
    • "AP": Almost perfect
    • "KH": K-Hyperperfect
    • "HP": Hemiperfect
    • "BL": Blum
    • "RG": Regular
    • "HD": Harmonic divisor
    • "AR": Arithmetic
    • "PP": Primary pseudoperfect
    • "KA": K-Almost prime (K=1 <--> Prime, K=2 <--> Semiprime, K=3 <--> Sphenic); v1.1
    • "CK": Coprime to K; v1.1
    • "PR": N has primitive roots; v1.1
    • "θR": θ is a primitive root modulo N; v1.1
    • "SH": Sphenic; v1.1
  • NTJK: Jordan's totient of N base K
  • NTLCM: LCM of L1
  • NTLI: Intersection of L1 and L2 --> L3
  • NTLJ: Kronecker symbol (generalized Legendre/Jacobi symbol) of N base θ (--> Z)
  • NTLS: Establish Lucas sequences U(P,Q) & V(P,Q) --> u & v (respectively); v1.1
  • NTMO: Multiplicative order of θ mod M
  • NTMU: Mobius function of N (w/o known factorization)
  • NTMX: θ^K mod M (modular exponentiation algorithm, preserves θ and K)
  • NTMZ: θ^K mod M (fast modular exponentiation algorithm, destroys θ andK); v1.2
  • NTN: TINT data initialization for N
  • NTPF: Prime factorization of N; does not preserve N
  • NTPG: List of primes up to X --> L1
  • NTPN: Generate next prime given all previous primes in L1
  • NTPT: If N is prime (w/o known factorization); v1.1: input the test as a two-letter string from the list below in Ans; a trial divison by 2 is always performed; tests may not always return 1 for a positive result
    • "TD": Trial division (all odd integers from 3 to √N)
    • "AD": Accelerated trial division (3, all integers ±1 mod 6 from 5 to √N)
    • "PD": Prime trial division (all primes from 2 to √N)
    • "Fθ": Fermat probable prime test base θ
    • "FR": Fermat probable prime with random base
    • "Sθ" or "MR": Strong probable prime test base θ (also called the Miller-Rabin primality test)
    • "SR": Strong probable prime test with random base
    • "Eθ": Euler probable prime test base θ
    • "ER": Euler probable prime test with random base
    • "LU": Lucas probable prime test for parameters P & Q
    • "LS": Strong Lucas probable prime test for parameters P & Q
    • "LE": Extra strong Lucas probable prime test for parameters P & Q
    • "BP": Baillie-PSW primality test
    • "FB": Frobenius probable prime test for parameters P & Q
    • "FI": Fibonacci probable prime test
    • "PL": Pell probable prime test
  • NTRL: List of primitive roots modulo N --> L1; v1.1
  • NTVP: Multiplicity of P in N (--> Z)

Have any questions? Found a bug? Contact kg583 on TI-Basic Developer.

Copyright © Kevin Gomez 2018. All rights reserved.