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The HP Prime has a feature called Exam Mode. This enables various features of the calculator (such as CAS functionality, user-created apps, notes, etc.) to be selectively disabled for a specific time, from 15 minutes to 8 hours. This can be done manually within the calculator's menus, or by using a computer with HP's connectivity software. [9]
HP Prime G2 (2AP18AA) 528 MHz NXP i.MX 6ULL MCIMX6Y2 (Cortex A7 core, ARMv7 architecture) 256 MB RAM, 512 MB flash 320×240 pixel 16-bit color multi-touch TFT LCD with backlight: Algebraic, Entry RPN: Fixed PPL: Xcas/Giac-based Unicode: No USB USB-OTG: USB-rechargeable 3.7 V/2000 mAh/7.4 Wh Li-Ion, USB 2018–present HP Prime G1: None
The system was also chosen by Hewlett-Packard as the CAS for their HP Prime calculator, which utilizes the Giac/Xcas 1.5.0 engine under a dual-license scheme. In 2013, the mathematical software Xcas was also integrated into GeoGebra 's CAS view.
In mathematics, the prime-counting function is the function counting the number of prime numbers less than or equal to some real number x. [1] [2] It is denoted by π(x) (unrelated to the number π). A symmetric variant seen sometimes is π 0 (x), which is equal to π(x) − 1 ⁄ 2 if x is exactly a prime number, and equal to π(x) otherwise.
HP's first scientific calculator, HP-35 With this in mind, HP built the HP 9100 desktop scientific calculator. This was a full-featured calculator that included not only standard "adding machine" functions but also powerful capabilities to handle floating-point numbers, trigonometric functions , logarithms, exponentiation, and square roots .
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Because the set of primes is a computably enumerable set, by Matiyasevich's theorem, it can be obtained from a system of Diophantine equations. Jones et al. (1976) found an explicit set of 14 Diophantine equations in 26 variables, such that a given number k + 2 is prime if and only if that system has a solution in nonnegative integers: [7]
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