Range Selection Matrix
Choose your competitive zone. Each 10-question exam dynamically synthesizes composite targets within your designated boundaries.
Elementary primes {2, 3, 5, 7, 11, 13}. Ideal for cadence calibration and mental warming.
Tests multi-prime mixtures including squares and cubes up to 19².
Standard national qualifier division. Involves primes up to 31.
4-digit entry range. Demands rapid divisibility shortcuts for 7, 11, and 13.
High composite complexity requiring multi-step tree decomposition.
Primes up to 97. High-stress mental calculations under timer pressure.
5-digit composite scale. Tests deep algebraic number theory intuition.
Programmatically capped at 35,000 for competitive balance and response precision.
Define tailored minimum and maximum integers with customized lifeline rules.
The ultimate unbounded trial. Random composites spanning the full spectrum of integers.