SenselessCompass
rating: 0+x

Item #: SCP-XXXX

Object Class: Safe

Special Containment Procedures: SCP-XXXX is to be locked in a 0.4 m x 0.3 m x 0.5 m metal container and stored at site-██. SCP-XXXX is to be plugged to SCP-XXXX-1 in the same container at all time. During testing, psychological past of test subjects must be reviewed by level-4 clearance staff.

Tests involving a division by zero must be done by drone, outside in inhabited field of a minimum of 1 kilometer of diameter.

Description: SCP-XXXX refers to a TI SR-10 model calculator manufactured by Texas Instrument. The physical appearance of the calculator is identical to similar TI SR-10 models manufactured in 1972, although SCP-XXXX doesn't seem to need batteries. On the back of the calculator is carved the words "NE PAS DIVISER PAR ZÉRO" translated to "DO NOT DIVIDE BY ZERO" from French.

When turned on, SCP-XXXX will display constantly changing numerals on the screen. Pressing any number doesn't do anything to the displayed numerals. Operators could be added and will normally divide, add, subtract or multiply the displayed number. The number entered following the operator should never be zero along with the result. Due to the relation between the warning carved behind the SCP-XXXX and the circumstance of its recovery forbid any human to divide by any number by zero.

In addition of this feature, SCP-XXXX will affect every calculators nearby. Other calculators will display a chain of numbers identical to SCP-XXXX. Division by zero on the affected calculators resulted in bright emission of light and the disappearance of their surrounding. The dimension of the area changes depending of the number divided by zero. Affected calculators have areas of effect half the size of the area of SCP-XXXX.

SCP-XXXX-1 is a small pink sheet of 15 cm x 15 cm . Several writing tests on SCP-XXXX-1 have shown that anything written on SCP-XXXX-1 is spontaneously erased when not observed. SCP-XXXX-1 can be taken far away from SCP-XXXX, but will spontaneously teleport to SCP-XXXX's location if not being observed. SCP-XXXX-1 display phrases when operations are done with SCP-XXXX. SCP-XXXX-1 seems to comment the operation given without specific meaning. It also appears to recognize the mathematical problem related to the operation as shown in test 34. The mathematical problem was taken from a book in which apple were involved. The phrases on SCP-XXXX-1 are related to the given operations and their context. A mathematical problem written by Dr. ████████ was asking directly SCP-XXXX-1, why couldn't any division by zero be done in test 99.

Test Operation Result displayed by SCP-XXXX Word displayed by SCP-XXXX-1
34 457987423 + 16 457987439 More apples!
52 789866541 + 789866541 789866541 x 2 Balance.
03 332687774 + 35 332687809 I am helping
78 859782441 - 98756 859683685 I calculate
91 888854735 x 0 0 Be careful!
10 998734561 / 0 ERROR Why did you want to do this?
99 214558951 x 2 429117902 ERROR

Complexe questions with SCP-XXXX-1 has shown no other message than ERROR. SCP-XXXX-1 is however able to answer questions not related to math or SCP-XXXX. It has shown strong knowledge of history, art, sport and science before 1972.

Addendum: SCP-XXXX was recovered from ██████ High School after the school spontaneously disappeared along with the surrounding streets in a diameter of 180 meters, the undergrounds and a portion of the an elevated railroad passing by the school. The word "ERROR" could be read on SCP-XXXX before recovery by the foundation. A massive use of amnesic has been needed due to the presence of the local fire department and the school neighborhood and due to the disappearance of the students and teachers of the school.