# ArithmeticError: reduction modulo not defined

I have tried performed modulo operation:

and I got this:

```
ArithmeticError Traceback (most recent call last) <ipython-input-1-b13f3c6e195a> in <module>
54 print(" po podziale x 2")
55 xP, yP = Pp.xy()
---> 56 uu = xQ % xP
57 print( f"uu mod = {(uu)} " )
/home/sc_serv/sage/local/lib/python3.8/site-packages/sage/rings/finite_rings/integer_mod.pyx in sage.rings.finite_rings.integer_mod.IntegerMod_abstract.__mod__ (build/cythonized/sage/rings/finite_rings/integer_mod.c:7287)()
493 R = IntegerModRing(modulus)
494 if (<Element>self)._parent._IntegerModRing_generic__order % R.order():
--> 495 raise ArithmeticError(f"reduction modulo {modulus!r} not defined")
496 return R(self)
497
ArithmeticError: reduction modulo 55066263022277343669578718895168534326250603453777594175500187360389116729240 not defined
```

i don't understand in python work

xQ = 0x5699b93fc6e1bd29e09a328d657a607b4155b61a6b5fcbedd7c12df7c67df8f5

xP = 0x79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798

I reformatted your question to present Sage's output without reformatting, in order to facilitate reading. You van do that by selecting the relevant text andclick on the "101010" button.

What are the parents of

`xQ`

and`xP`

?Your question might be answerable if you could post you source code or, better, a

minimalexample exhibiting your problem.