sagemathgh-38344: Support ECM 7.0.6

    
Two breaking changes:

- The `-I` option has been removed https://gitlab.inria.fr/zimmerma/ecm/
-/commit/df9dd6fc43852868455a390aed5c8ab4974ee2a1
- Factoring 1 now throws an error https://gitlab.inria.fr/zimmerma/ecm/-
/commit/7c29926c3902c34bbccde21eb9d02624dc991dfc
    
URL: sagemath#38344
Reported by: Antonio Rojas
Reviewer(s): Gonzalo Tornaría, Matthias Köppe

src/sage/interfaces/ecm.py

@@ -509,7 +509,6 @@ def _find_factor(self, n, factor_digits, B1, **kwds):
         """
         n = self._validate(n)
         kwds.setdefault('c', 1000000000)
-        kwds.setdefault('I', 1)
         if factor_digits is not None:
             B1 = self.recommended_B1(factor_digits)
         kwds['one'] = True

src/sage/libs/libecm.pyx

@@ -150,11 +150,13 @@ def ecmfactor(number, double B1, verbose=False, sigma=0):
     Some special cases::
 
         sage: ecmfactor(1, 100)
-        (True, 1, ...)
+        Traceback (most recent call last):
+        ...
+        ValueError: Input number (1) must be greater than 1
         sage: ecmfactor(0, 100)
         Traceback (most recent call last):
         ...
-        ValueError: Input number (0) must be positive
+        ValueError: Input number (0) must be greater than 1
     """
     cdef mpz_t n, f
     cdef int res
@@ -165,8 +167,8 @@ def ecmfactor(number, double B1, verbose=False, sigma=0):
     sage_int_number = Integer(number)
     sage_int_sigma = Integer(sigma)
 
-    if number <= 0:
-        raise ValueError("Input number (%s) must be positive"%number)
+    if number <= 1:
+        raise ValueError("Input number (%s) must be greater than 1"%number)
 
     if verbose:
         print("Performing one curve with B1=%1.0f" % B1)